10621657 has 2 divisors, whose sum is σ = 10621658. Its totient is φ = 10621656.

The previous prime is 10621643. The next prime is 10621673. The reversal of 10621657 is 75612601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10621081 + 576 = 3259^2 + 24^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10621657 is a prime.

It is a super-2 number, since 2×10621657² = 225639194851298, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10621687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310828 + 5310829.

It is an arithmetic number, because the mean of its divisors is an integer number (5310829).

Almost surely, 2^10621657 is an apocalyptic number.

It is an amenable number.

10621657 is a deficient number, since it is larger than the sum of its proper divisors (1).

10621657 is an equidigital number, since it uses as much as digits as its factorization.

10621657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 10621657 is about 3259.0883694678. The cubic root of 10621657 is about 219.8184245594.

The spelling of 10621657 in words is "ten million, six hundred twenty-one thousand, six hundred fifty-seven".