1312661015 has 8 divisors (see below), whose sum is σ = 1576090320. Its totient is φ = 1049530752.

The previous prime is 1312660903. The next prime is 1312661027. The reversal of 1312661015 is 5101662131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312661015 - 2⁸ = 1312660759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64985 + ... + 82754.

It is an arithmetic number, because the mean of its divisors is an integer number (197011290).

Almost surely, 2^1312661015 is an apocalyptic number.

1312661015 is a deficient number, since it is larger than the sum of its proper divisors (263429305).

1312661015 is a wasteful number, since it uses less digits than its factorization.

1312661015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149521.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1312661015 is about 36230.6640154442. The cubic root of 1312661015 is about 1094.9245557301.

The spelling of 1312661015 in words is "one billion, three hundred twelve million, six hundred sixty-one thousand, fifteen".