1312289495 has 32 divisors (see below), whose sum is σ = 1800175104. Its totient is φ = 909040000.

The previous prime is 1312289479. The next prime is 1312289513. The reversal of 1312289495 is 5949822131.

It is not a de Polignac number, because 1312289495 - 2⁴ = 1312289479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315449 + ... + 319581.

It is an arithmetic number, because the mean of its divisors is an integer number (56255472).

Almost surely, 2^1312289495 is an apocalyptic number.

1312289495 is a deficient number, since it is larger than the sum of its proper divisors (487885609).

1312289495 is a wasteful number, since it uses less digits than its factorization.

1312289495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423.

The product of its digits is 155520, while the sum is 44.

The square root of 1312289495 is about 36225.5365039636. The cubic root of 1312289495 is about 1094.8212478312.

The spelling of 1312289495 in words is "one billion, three hundred twelve million, two hundred eighty-nine thousand, four hundred ninety-five".