13056138 has 12 divisors (see below), whose sum is σ = 28288338. Its totient is φ = 4352040.

The previous prime is 13056107. The next prime is 13056151. The reversal of 13056138 is 83165031.

It can be written as a sum of positive squares in only one way, i.e., 12981609 + 74529 = 3603^2 + 273^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 362653 + ... + 362688.

Almost surely, 2^13056138 is an apocalyptic number.

13056138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13056138 is an abundant number, since it is smaller than the sum of its proper divisors (15232200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13056138 is a wasteful number, since it uses less digits than its factorization.

13056138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725349 (or 725346 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13056138 is about 3613.3278290241. The cubic root of 13056138 is about 235.4714423023.

The spelling of 13056138 in words is "thirteen million, fifty-six thousand, one hundred thirty-eight".