12291975 has 18 divisors (see below), whose sum is σ = 22016696. Its totient is φ = 6555600.

The previous prime is 12291967. The next prime is 12291989. The reversal of 12291975 is 57919221.

It is not a de Polignac number, because 12291975 - 2³ = 12291967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27091 + ... + 27540.

Almost surely, 2^12291975 is an apocalyptic number.

12291975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12291975 is a deficient number, since it is larger than the sum of its proper divisors (9724721).

12291975 is a wasteful number, since it uses less digits than its factorization.

12291975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54647 (or 54639 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 12291975 is about 3505.9913006167. The cubic root of 12291975 is about 230.7848111276.

The spelling of 12291975 in words is "twelve million, two hundred ninety-one thousand, nine hundred seventy-five".