12609657 has 12 divisors (see below), whose sum is σ = 18523440. Its totient is φ = 8263608.

The previous prime is 12609647. The next prime is 12609659. The reversal of 12609657 is 75690621.

It is a de Polignac number, because none of the positive numbers 2^k-12609657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12609659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11343 + ... + 12404.

It is an arithmetic number, because the mean of its divisors is an integer number (1543620).

Almost surely, 2^12609657 is an apocalyptic number.

It is an amenable number.

12609657 is a deficient number, since it is larger than the sum of its proper divisors (5913783).

12609657 is a wasteful number, since it uses less digits than its factorization.

12609657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23812 (or 23809 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 12609657 is about 3551.0078850940. The cubic root of 12609657 is about 232.7561104245.

The spelling of 12609657 in words is "twelve million, six hundred nine thousand, six hundred fifty-seven".