4256645 has 8 divisors (see below), whose sum is σ = 5159160. Its totient is φ = 3371200.

The previous prime is 4256639. The next prime is 4256653. The reversal of 4256645 is 5466524.

It can be written as a sum of positive squares in 4 ways, for example, as 744769 + 3511876 = 863^2 + 1874^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4256645 - 2⁸ = 4256389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3710 + ... + 4719.

It is an arithmetic number, because the mean of its divisors is an integer number (644895).

Almost surely, 2^4256645 is an apocalyptic number.

It is an amenable number.

4256645 is a deficient number, since it is larger than the sum of its proper divisors (902515).

4256645 is a wasteful number, since it uses less digits than its factorization.

4256645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535.

The product of its digits is 28800, while the sum is 32.

The square root of 4256645 is about 2063.1638325640. The cubic root of 4256645 is about 162.0649665763.

The spelling of 4256645 in words is "four million, two hundred fifty-six thousand, six hundred forty-five".