12997426 has 16 divisors (see below), whose sum is σ = 21067200. Its totient is φ = 5978448.

The previous prime is 12997421. The next prime is 12997433. The reversal of 12997426 is 62479921.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12997421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9195 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (1316700).

Almost surely, 2^12997426 is an apocalyptic number.

12997426 is a deficient number, since it is larger than the sum of its proper divisors (8069774).

12997426 is a wasteful number, since it uses less digits than its factorization.

12997426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713.

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

The square root of 12997426 is about 3605.1943082170. The cubic root of 12997426 is about 235.1179489388.

The spelling of 12997426 in words is "twelve million, nine hundred ninety-seven thousand, four hundred twenty-six".