12991875 has 60 divisors (see below), whose sum is σ = 24011064. Its totient is φ = 6240000.

The previous prime is 12991871. The next prime is 12991879. The reversal of 12991875 is 57819921.

12991875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12991871) and next prime (12991879).

It is not a de Polignac number, because 12991875 - 2² = 12991871 is a prime.

Its product of digits (45360) is a multiple of the sum of its prime factors (90).

It is not an unprimeable number, because it can be changed into a prime (12991871) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 316855 + ... + 316895.

Almost surely, 2^12991875 is an apocalyptic number.

12991875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12991875 is a deficient number, since it is larger than the sum of its proper divisors (11019189).

12991875 is an equidigital number, since it uses as much as digits as its factorization.

12991875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 62 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 12991875 is about 3604.4243645831. The cubic root of 12991875 is about 235.0844724238.

It can be divided in two parts, 12 and 991875, that multiplied together give a square (11902500 = 3450²).

The spelling of 12991875 in words is "twelve million, nine hundred ninety-one thousand, eight hundred seventy-five".