12491955 has 32 divisors (see below), whose sum is σ = 25382400. Its totient is φ = 5710176.

The previous prime is 12491939. The next prime is 12491971. The reversal of 12491955 is 55919421.

It is an interprime number because it is at equal distance from previous prime (12491939) and next prime (12491971).

It is not a de Polignac number, because 12491955 - 2⁴ = 12491939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5665 + ... + 7554.

It is an arithmetic number, because the mean of its divisors is an integer number (793200).

Almost surely, 2^12491955 is an apocalyptic number.

12491955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12491955 is an abundant number, since it is smaller than the sum of its proper divisors (12890445).

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

12491955 is a wasteful number, since it uses less digits than its factorization.

12491955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13240 (or 13234 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 12491955 is about 3534.3959880013. The cubic root of 12491955 is about 232.0296422192.

The spelling of 12491955 in words is "twelve million, four hundred ninety-one thousand, nine hundred fifty-five".