| Base | Representation |
|---|---|
| bin | 100100100000100… |
| … | …0011010111011100 |
| 3 | 10011101002002111202 |
| 4 | 1021001003113130 |
| 5 | 10002100401300 |
| 6 | 321320135032 |
| 7 | 42233302412 |
| oct | 11101032734 |
| 9 | 3141062452 |
| 10 | 1225012700 |
| 11 | 57954019a |
| 12 | 2a2307478 |
| 13 | 166a413b2 |
| 14 | b89a12b2 |
| 15 | 7282bad5 |
| hex | 490435dc |
1225012700 has 72 divisors (see below), whose sum is σ = 2753823744. Its totient is φ = 472696000.
The previous prime is 1225012667. The next prime is 1225012703. The reversal of 1225012700 is 72105221.
It is a super-2 number, since 2×12250127002 = 3001312230322580000, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1225012703) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331865 + ... + 335535.
It is an arithmetic number, because the mean of its divisors is an integer number (38247552).
Almost surely, 21225012700 is an apocalyptic number.
1225012700 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 1225012700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1376911872).
1225012700 is an abundant number, since it is smaller than the sum of its proper divisors (1528811044).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1225012700 is a wasteful number, since it uses less digits than its factorization.
1225012700 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3803 (or 3796 counting only the distinct ones).
The product of its (nonzero) digits is 280, while the sum is 20.
The square root of 1225012700 is about 35000.1814281012. The cubic root of 1225012700 is about 1069.9911781961.
Adding to 1225012700 its reverse (72105221), we get a palindrome (1297117921).
The spelling of 1225012700 in words is "one billion, two hundred twenty-five million, twelve thousand, seven hundred".
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