12815251 has 2 divisors, whose sum is σ = 12815252. Its totient is φ = 12815250.

The previous prime is 12815249. The next prime is 12815261. The reversal of 12815251 is 15251821.

12815251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12815251 - 2¹ = 12815249 is a prime.

Together with 12815249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12815221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6407625 + 6407626.

It is an arithmetic number, because the mean of its divisors is an integer number (6407626).

Almost surely, 2^12815251 is an apocalyptic number.

12815251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12815251 is an equidigital number, since it uses as much as digits as its factorization.

12815251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 25.

The square root of 12815251 is about 3579.8395215428. The cubic root of 12815251 is about 234.0142867552.

The spelling of 12815251 in words is "twelve million, eight hundred fifteen thousand, two hundred fifty-one".