12131251 has 16 divisors (see below), whose sum is σ = 14502240. Its totient is φ = 10017280.

The previous prime is 12131219. The next prime is 12131257. The reversal of 12131251 is 15213121.

It is a cyclic number.

It is not a de Polignac number, because 12131251 - 2⁵ = 12131219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4305 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (906390).

Almost surely, 2^12131251 is an apocalyptic number.

12131251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12131251 is a deficient number, since it is larger than the sum of its proper divisors (2370989).

12131251 is a wasteful number, since it uses less digits than its factorization.

12131251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294.

The product of its digits is 60, while the sum is 16.

The square root of 12131251 is about 3482.9945449283. The cubic root of 12131251 is about 229.7745175189.

Adding to 12131251 its reverse (15213121), we get a palindrome (27344372).

The spelling of 12131251 in words is "twelve million, one hundred thirty-one thousand, two hundred fifty-one".