10656021 has 16 divisors (see below), whose sum is σ = 14981760. Its totient is φ = 6726720.

The previous prime is 10656007. The next prime is 10656031. The reversal of 10656021 is 12065601.

It is a happy number.

It is not a de Polignac number, because 10656021 - 2¹⁰ = 10654997 is a prime.

It is a super-2 number, since 2×10656021² = 227101567104882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10656001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3456 + ... + 5766.

It is an arithmetic number, because the mean of its divisors is an integer number (936360).

Almost surely, 2^10656021 is an apocalyptic number.

It is an amenable number.

10656021 is a deficient number, since it is larger than the sum of its proper divisors (4325739).

10656021 is a wasteful number, since it uses less digits than its factorization.

10656021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 10656021 is about 3264.3561386589. The cubic root of 10656021 is about 220.0552271818.

The spelling of 10656021 in words is "ten million, six hundred fifty-six thousand, twenty-one".