1312042251 has 16 divisors (see below), whose sum is σ = 1884635424. Its totient is φ = 807120384.

The previous prime is 1312042247. The next prime is 1312042253. The reversal of 1312042251 is 1522402131.

It is not a de Polignac number, because 1312042251 - 2² = 1312042247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312042253) 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, 165265 + ... + 173021.

It is an arithmetic number, because the mean of its divisors is an integer number (117789714).

Almost surely, 2^1312042251 is an apocalyptic number.

1312042251 is a deficient number, since it is larger than the sum of its proper divisors (572593173).

1312042251 is a wasteful number, since it uses less digits than its factorization.

1312042251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12110.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1312042251 is about 36222.1237781553. The cubic root of 1312042251 is about 1094.7524863302.

Adding to 1312042251 its reverse (1522402131), we get a palindrome (2834444382).

The spelling of 1312042251 in words is "one billion, three hundred twelve million, forty-two thousand, two hundred fifty-one".