12553657 has 2 divisors, whose sum is σ = 12553658. Its totient is φ = 12553656.

The previous prime is 12553649. The next prime is 12553669. The reversal of 12553657 is 75635521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 2383936 = 3189^2 + 1544^2 .

It is a cyclic number.

It is not a de Polignac number, because 12553657 - 2³ = 12553649 is a prime.

It is not a weakly prime, because it can be changed into another prime (12553637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6276828 + 6276829.

It is an arithmetic number, because the mean of its divisors is an integer number (6276829).

Almost surely, 2^12553657 is an apocalyptic number.

It is an amenable number.

12553657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12553657 is an equidigital number, since it uses as much as digits as its factorization.

12553657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 34.

The square root of 12553657 is about 3543.1140258253. The cubic root of 12553657 is about 232.4110393074.

The spelling of 12553657 in words is "twelve million, five hundred fifty-three thousand, six hundred fifty-seven".