4256657 has 4 divisors (see below), whose sum is σ = 4270656. Its totient is φ = 4242660.

The previous prime is 4256653. The next prime is 4256669. The reversal of 4256657 is 7566524.

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.

It is a cyclic number.

It is not a de Polignac number, because 4256657 - 2² = 4256653 is a prime.

It is a d-powerful number, because it can be written as 4 + 2²² + 5² + 6² + 6⁶ + 5⁶ + 7 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4256653) 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, 6533 + ... + 7154.

It is an arithmetic number, because the mean of its divisors is an integer number (1067664).

Almost surely, 2^4256657 is an apocalyptic number.

It is an amenable number.

4256657 is a deficient number, since it is larger than the sum of its proper divisors (13999).

4256657 is a wasteful number, since it uses less digits than its factorization.

4256657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13998.

The product of its digits is 50400, while the sum is 35.

The square root of 4256657 is about 2063.1667407168. The cubic root of 4256657 is about 162.0651188698.

It can be divided in two parts, 4256 and 657, that added together give a cube (4913 = 17³).

The spelling of 4256657 in words is "four million, two hundred fifty-six thousand, six hundred fifty-seven".