12997642 has 16 divisors (see below), whose sum is σ = 22737600. Its totient is φ = 5570124.

The previous prime is 12997637. The next prime is 12997651. The reversal of 12997642 is 24679921.

It is a junction number, because it is equal to n+sod(n) for n = 12997595 and 12997604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8788 + ... + 10159.

It is an arithmetic number, because the mean of its divisors is an integer number (1421100).

Almost surely, 2^12997642 is an apocalyptic number.

12997642 is a deficient number, since it is larger than the sum of its proper divisors (9739958).

12997642 is an equidigital number, since it uses as much as digits as its factorization.

12997642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18970 (or 18956 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 12997642 is about 3605.2242648690. The cubic root of 12997642 is about 235.1192513812.

The spelling of 12997642 in words is "twelve million, nine hundred ninety-seven thousand, six hundred forty-two".