12311251 has 2 divisors, whose sum is σ = 12311252. Its totient is φ = 12311250.

The previous prime is 12311219. The next prime is 12311261. The reversal of 12311251 is 15211321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12311251 - 2⁵ = 12311219 is a prime.

It is not a weakly prime, because it can be changed into another prime (12311261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155625 + 6155626.

It is an arithmetic number, because the mean of its divisors is an integer number (6155626).

Almost surely, 2^12311251 is an apocalyptic number.

12311251 is the 1876-th centered heptagonal number.

12311251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311251 is an equidigital number, since it uses as much as digits as its factorization.

12311251 is an evil number, because the sum of its binary digits is even.

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

The square root of 12311251 is about 3508.7392322599. The cubic root of 12311251 is about 230.9053853136.

Adding to 12311251 its reverse (15211321), we get a palindrome (27522572).

The spelling of 12311251 in words is "twelve million, three hundred eleven thousand, two hundred fifty-one".