12137081 has 4 divisors (see below), whose sum is σ = 13240464. Its totient is φ = 11033700.

The previous prime is 12137039. The next prime is 12137087. The reversal of 12137081 is 18073121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12137081 - 2⁶ = 12137017 is a prime.

It is a super-2 number, since 2×12137081² = 294617470401122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12137087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551675 + ... + 551696.

It is an arithmetic number, because the mean of its divisors is an integer number (3310116).

Almost surely, 2^12137081 is an apocalyptic number.

12137081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12137081 is a deficient number, since it is larger than the sum of its proper divisors (1103383).

12137081 is a wasteful number, since it uses less digits than its factorization.

12137081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103382.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 12137081 is about 3483.8313679052. The cubic root of 12137081 is about 229.8113197388.

The spelling of 12137081 in words is "twelve million, one hundred thirty-seven thousand, eighty-one".