1312578251 has 16 divisors (see below), whose sum is σ = 1391040000. Its totient is φ = 1236650016.

The previous prime is 1312578229. The next prime is 1312578269. The reversal of 1312578251 is 1528752131.

It is not a de Polignac number, because 1312578251 - 2⁶ = 1312578187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312578271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235070 + ... + 240588.

It is an arithmetic number, because the mean of its divisors is an integer number (86940000).

Almost surely, 2^1312578251 is an apocalyptic number.

1312578251 is a deficient number, since it is larger than the sum of its proper divisors (78461749).

1312578251 is a wasteful number, since it uses less digits than its factorization.

1312578251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746.

The product of its digits is 16800, while the sum is 35.

The square root of 1312578251 is about 36229.5218157789. The cubic root of 1312578251 is about 1094.9015433810.

The spelling of 1312578251 in words is "one billion, three hundred twelve million, five hundred seventy-eight thousand, two hundred fifty-one".