4256731 has 4 divisors (see below), whose sum is σ = 4267264. Its totient is φ = 4246200.

The previous prime is 4256729. The next prime is 4256737. The reversal of 4256731 is 1376524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4256731 - 2¹ = 4256729 is a prime.

It is a super-2 number, since 2×4256731² = 36239517612722, which contains 22 as substring.

It is a Duffinian number.

4256731 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4256731.

It is not an unprimeable number, because it can be changed into a prime (4256737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4635 + ... + 5476.

It is an arithmetic number, because the mean of its divisors is an integer number (1066816).

Almost surely, 2^4256731 is an apocalyptic number.

4256731 is a deficient number, since it is larger than the sum of its proper divisors (10533).

4256731 is a wasteful number, since it uses less digits than its factorization.

4256731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10532.

The product of its digits is 5040, while the sum is 28.

The square root of 4256731 is about 2063.1846742354. The cubic root of 4256731 is about 162.0660580066.

The spelling of 4256731 in words is "four million, two hundred fifty-six thousand, seven hundred thirty-one".