12399572 has 6 divisors (see below), whose sum is σ = 21699258. Its totient is φ = 6199784.

The previous prime is 12399547. The next prime is 12399577. The reversal of 12399572 is 27599321.

It can be written as a sum of positive squares in only one way, i.e., 9461776 + 2937796 = 3076^2 + 1714^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1549943 + ... + 1549950.

It is an arithmetic number, because the mean of its divisors is an integer number (3616543).

Almost surely, 2^12399572 is an apocalyptic number.

It is an amenable number.

12399572 is a deficient number, since it is larger than the sum of its proper divisors (9299686).

12399572 is a wasteful number, since it uses less digits than its factorization.

12399572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099897 (or 3099895 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 12399572 is about 3521.3025998911. The cubic root of 12399572 is about 231.4562424001.

The spelling of 12399572 in words is "twelve million, three hundred ninety-nine thousand, five hundred seventy-two".