13656057 has 4 divisors (see below), whose sum is σ = 18208080. Its totient is φ = 9104036.

The previous prime is 13656031. The next prime is 13656077. The reversal of 13656057 is 75065631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75065631 = 3 ⋅25021877.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13656057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13656077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276007 + ... + 2276012.

It is an arithmetic number, because the mean of its divisors is an integer number (4552020).

Almost surely, 2^13656057 is an apocalyptic number.

It is an amenable number.

13656057 is a deficient number, since it is larger than the sum of its proper divisors (4552023).

13656057 is an equidigital number, since it uses as much as digits as its factorization.

13656057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552022.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 13656057 is about 3695.4102613918. The cubic root of 13656057 is about 239.0241451304.

The spelling of 13656057 in words is "thirteen million, six hundred fifty-six thousand, fifty-seven".