12391974 has 32 divisors (see below), whose sum is σ = 31472640. Its totient is φ = 3540456.

The previous prime is 12391937. The next prime is 12391987. The reversal of 12391974 is 47919321.

12391974 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12391974² = 307122039233352, which contains 22 as substring.

12391974 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16014 + ... + 16769.

It is an arithmetic number, because the mean of its divisors is an integer number (983520).

Almost surely, 2^12391974 is an apocalyptic number.

12391974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12391974 is an abundant number, since it is smaller than the sum of its proper divisors (19080666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12391974 is a wasteful number, since it uses less digits than its factorization.

12391974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32801 (or 32795 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 12391974 is about 3520.2235724454. The cubic root of 12391974 is about 231.4089567934.

The spelling of 12391974 in words is "twelve million, three hundred ninety-one thousand, nine hundred seventy-four".