12921374 has 4 divisors (see below), whose sum is σ = 19382064. Its totient is φ = 6460686.

The previous prime is 12921373. The next prime is 12921397. The reversal of 12921374 is 47312921.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921373) 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 as a sum of consecutive naturals, namely, 3230342 + ... + 3230345.

It is an arithmetic number, because the mean of its divisors is an integer number (4845516).

Almost surely, 2^12921374 is an apocalyptic number.

12921374 is a deficient number, since it is larger than the sum of its proper divisors (6460690).

12921374 is an equidigital number, since it uses as much as digits as its factorization.

12921374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460689.

The product of its digits is 3024, while the sum is 29.

The square root of 12921374 is about 3594.6312745538. The cubic root of 12921374 is about 234.6584687255.

The spelling of 12921374 in words is "twelve million, nine hundred twenty-one thousand, three hundred seventy-four".