12640562 has 16 divisors (see below), whose sum is σ = 20747232. Its totient is φ = 5728320.

The previous prime is 12640561. The next prime is 12640601. The reversal of 12640562 is 26504621.

It is not an unprimeable number, because it can be changed into a prime (12640561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9098 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (1296702).

Almost surely, 2^12640562 is an apocalyptic number.

12640562 is a deficient number, since it is larger than the sum of its proper divisors (8106670).

12640562 is a wasteful number, since it uses less digits than its factorization.

12640562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 12640562 is about 3555.3568034728. The cubic root of 12640562 is about 232.9461092186.

The spelling of 12640562 in words is "twelve million, six hundred forty thousand, five hundred sixty-two".