| Base | Representation |
|---|---|
| bin | 100101011010111… |
| … | …0110110100001010 |
| 3 | 10020111200201111000 |
| 4 | 1022311312310022 |
| 5 | 10032420212023 |
| 6 | 324332315430 |
| 7 | 43054461045 |
| oct | 11265666412 |
| 9 | 3214621430 |
| 10 | 1255632138 |
| 11 | 594854012 |
| 12 | 2b0612b76 |
| 13 | 1701a22c7 |
| 14 | bca91c5c |
| 15 | 75379243 |
| hex | 4ad76d0a |
1255632138 has 128 divisors (see below), whose sum is σ = 3134419200. Its totient is φ = 370262016.
The previous prime is 1255632137. The next prime is 1255632139. The reversal of 1255632138 is 8312365521.
1255632138 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 632 + 13 + 8 = 666.
It is an interprime number because it is at equal distance from previous prime (1255632137) and next prime (1255632139).
It is a super-2 number, since 2×12556321382 = 3153224131956902088, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (1255632137) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3366120 + ... + 3366492.
It is an arithmetic number, because the mean of its divisors is an integer number (24487650).
Almost surely, 21255632138 is an apocalyptic number.
1255632138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 1255632138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567209600).
1255632138 is an abundant number, since it is smaller than the sum of its proper divisors (1878787062).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1255632138 is a wasteful number, since it uses less digits than its factorization.
1255632138 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 613 (or 607 counting only the distinct ones).
The product of its digits is 43200, while the sum is 36.
The square root of 1255632138 is about 35434.8999998589. The cubic root of 1255632138 is about 1078.8327976507.
Adding to 1255632138 its reverse (8312365521), we get a palindrome (9567997659).
The spelling of 1255632138 in words is "one billion, two hundred fifty-five million, six hundred thirty-two thousand, one hundred thirty-eight".
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