10256731 has 4 divisors (see below), whose sum is σ = 10401264. Its totient is φ = 10112200.

The previous prime is 10256711. The next prime is 10256759. The reversal of 10256731 is 13765201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13765201 = 23 ⋅598487.

It is a cyclic number.

It is not a de Polignac number, because 10256731 - 2¹⁵ = 10223963 is a prime.

It is a super-2 number, since 2×10256731² = 210401061612722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10256696 and 10256705.

It is not an unprimeable number, because it can be changed into a prime (10256711) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 72160 + ... + 72301.

It is an arithmetic number, because the mean of its divisors is an integer number (2600316).

Almost surely, 2^10256731 is an apocalyptic number.

10256731 is a deficient number, since it is larger than the sum of its proper divisors (144533).

10256731 is an equidigital number, since it uses as much as digits as its factorization.

10256731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144532.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 10256731 is about 3202.6131517871. The cubic root of 10256731 is about 217.2716129976.

The spelling of 10256731 in words is "ten million, two hundred fifty-six thousand, seven hundred thirty-one".