12665572 has 6 divisors (see below), whose sum is σ = 22164758. Its totient is φ = 6332784.

The previous prime is 12665563. The next prime is 12665593. The reversal of 12665572 is 27556621.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 443556 = 3496^2 + 666^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583193 + ... + 1583200.

Almost surely, 2^12665572 is an apocalyptic number.

It is an amenable number.

12665572 is a deficient number, since it is larger than the sum of its proper divisors (9499186).

12665572 is a wasteful number, since it uses less digits than its factorization.

12665572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166397 (or 3166395 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 12665572 is about 3558.8722932974. The cubic root of 12665572 is about 233.0996399470.

The spelling of 12665572 in words is "twelve million, six hundred sixty-five thousand, five hundred seventy-two".