12644516 has 6 divisors (see below), whose sum is σ = 22127910. Its totient is φ = 6322256.

The previous prime is 12644483. The next prime is 12644561. The reversal of 12644516 is 61544621.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 422500 = 3496^2 + 650^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580561 + ... + 1580568.

It is an arithmetic number, because the mean of its divisors is an integer number (3687985).

Almost surely, 2^12644516 is an apocalyptic number.

It is an amenable number.

12644516 is a deficient number, since it is larger than the sum of its proper divisors (9483394).

12644516 is a wasteful number, since it uses less digits than its factorization.

12644516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161133 (or 3161131 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 12644516 is about 3555.9128223285. The cubic root of 12644516 is about 232.9703953987.

The spelling of 12644516 in words is "twelve million, six hundred forty-four thousand, five hundred sixteen".