1312825251 has 4 divisors (see below), whose sum is σ = 1750433672. Its totient is φ = 875216832.

The previous prime is 1312825247. The next prime is 1312825279. The reversal of 1312825251 is 1525282131.

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

It is not a de Polignac number, because 1312825251 - 2² = 1312825247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312825351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218804206 + ... + 218804211.

It is an arithmetic number, because the mean of its divisors is an integer number (437608418).

Almost surely, 2^1312825251 is an apocalyptic number.

1312825251 is a deficient number, since it is larger than the sum of its proper divisors (437608421).

1312825251 is an equidigital number, since it uses as much as digits as its factorization.

1312825251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437608420.

The product of its digits is 4800, while the sum is 30.

The square root of 1312825251 is about 36232.9304776746. The cubic root of 1312825251 is about 1094.9702183264.

The spelling of 1312825251 in words is "one billion, three hundred twelve million, eight hundred twenty-five thousand, two hundred fifty-one".