12506131 has 4 divisors (see below), whose sum is σ = 13643064. Its totient is φ = 11369200.

The previous prime is 12506083. The next prime is 12506147. The reversal of 12506131 is 13160521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12506131 - 2⁷ = 12506003 is a prime.

It is a super-2 number, since 2×12506131² = 312806625178322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12506099 and 12506108.

It is not an unprimeable number, because it can be changed into a prime (12503131) 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, 568450 + ... + 568471.

It is an arithmetic number, because the mean of its divisors is an integer number (3410766).

Almost surely, 2^12506131 is an apocalyptic number.

12506131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12506131 is a deficient number, since it is larger than the sum of its proper divisors (1136933).

12506131 is a wasteful number, since it uses less digits than its factorization.

12506131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136932.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 12506131 is about 3536.4008539757. The cubic root of 12506131 is about 232.1173789203.

Adding to 12506131 its reverse (13160521), we get a palindrome (25666652).

It can be divided in two parts, 1250 and 6131, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 12506131 in words is "twelve million, five hundred six thousand, one hundred thirty-one".