10656921 has 16 divisors (see below), whose sum is σ = 15833088. Its totient is φ = 6320400.

The previous prime is 10656911. The next prime is 10656923. The reversal of 10656921 is 12965601.

10656921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10656921 - 2⁶ = 10656857 is a prime.

It is a super-2 number, since 2×10656921² = 227139930400482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10656923) 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 15 ways as a sum of consecutive naturals, for example, 1885 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (989568).

Almost surely, 2^10656921 is an apocalyptic number.

10656921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10656921 is a deficient number, since it is larger than the sum of its proper divisors (5176167).

10656921 is a wasteful number, since it uses less digits than its factorization.

10656921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 10656921 is about 3264.4939883541. The cubic root of 10656921 is about 220.0614222437.

The spelling of 10656921 in words is "ten million, six hundred fifty-six thousand, nine hundred twenty-one".