| Base | Representation |
|---|---|
| bin | 100101010000001… |
| … | …0111110010000000 |
| 3 | 10020010002120122022 |
| 4 | 1022200113302000 |
| 5 | 10030000000000 |
| 6 | 324011501012 |
| 7 | 42655552604 |
| oct | 11240276200 |
| 9 | 3203076568 |
| 10 | 1250000000 |
| 11 | 591657557 |
| 12 | 2aa757768 |
| 13 | 16bc7c892 |
| 14 | bc027504 |
| 15 | 74b15585 |
| hex | 4a817c80 |
1250000000 has 88 divisors (see below), whose sum is σ = 3112792905. Its totient is φ = 500000000.
The previous prime is 1249999997. The next prime is 1250000027. The reversal of 1250000000 is 521.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 6 ways, for example, as 719526976 + 530473024 = 26824^2 + 23032^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=25000.
It is a Harshad number since it is a multiple of its sum of digits (8).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 10 ways as a sum of consecutive naturals, for example, 249999998 + ... + 250000002.
Almost surely, 21250000000 is an apocalyptic number.
1250000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1250000000
1250000000 is an abundant number, since it is smaller than the sum of its proper divisors (1862792905).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1250000000 is an frugal number, since it uses more digits than its factorization.
1250000000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 64 (or 7 counting only the distinct ones).
The product of its (nonzero) digits is 10, while the sum is 8.
The square root of 1250000000 is about 35355.3390593274. The cubic root of 1250000000 is about 1077.2173450159.
1250000000 divided by its product of nonzero digits (10) gives a cube (125000000 = 5003).
Adding to 1250000000 its reverse (521), we get a palindrome (1250000521).
The spelling of 1250000000 in words is "one billion, two hundred fifty million", and thus it is an aban number.
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