12645567 has 12 divisors (see below), whose sum is σ = 19926504. Its totient is φ = 7663920.

The previous prime is 12645547. The next prime is 12645623. The reversal of 12645567 is 76554621.

It is a happy number.

12645567 is a `hidden beast` number, since 1 + 2 + 645 + 5 + 6 + 7 = 666.

It is not a de Polignac number, because 12645567 - 2⁷ = 12645439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645547) 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, 63768 + ... + 63965.

It is an arithmetic number, because the mean of its divisors is an integer number (1660542).

Almost surely, 2^12645567 is an apocalyptic number.

12645567 is a deficient number, since it is larger than the sum of its proper divisors (7280937).

12645567 is a wasteful number, since it uses less digits than its factorization.

12645567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127750 (or 127747 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 12645567 is about 3556.0606012834. The cubic root of 12645567 is about 232.9768499782.

The spelling of 12645567 in words is "twelve million, six hundred forty-five thousand, five hundred sixty-seven".