12645971 has 16 divisors (see below), whose sum is σ = 14249088. Its totient is φ = 11145600.

The previous prime is 12645967. The next prime is 12645973. The reversal of 12645971 is 17954621.

12645971 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12645971 - 2² = 12645967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645973) 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, 29126 + ... + 29556.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^12645971 is an apocalyptic number.

12645971 is a deficient number, since it is larger than the sum of its proper divisors (1603117).

12645971 is a wasteful number, since it uses less digits than its factorization.

12645971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 15120, while the sum is 35.

The square root of 12645971 is about 3556.1174052610. The cubic root of 12645971 is about 232.9793309964.

The spelling of 12645971 in words is "twelve million, six hundred forty-five thousand, nine hundred seventy-one".