1312560691 has 8 divisors (see below), whose sum is σ = 1415700720. Its totient is φ = 1209731232.

The previous prime is 1312560673. The next prime is 1312560749. The reversal of 1312560691 is 1960652131.

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 1312560691 - 2⁷ = 1312560563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312560611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68821 + ... + 85798.

It is an arithmetic number, because the mean of its divisors is an integer number (176962590).

Almost surely, 2^1312560691 is an apocalyptic number.

1312560691 is a deficient number, since it is larger than the sum of its proper divisors (103140029).

1312560691 is a wasteful number, since it uses less digits than its factorization.

1312560691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155285.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1312560691 is about 36229.2794711681. The cubic root of 1312560691 is about 1094.8966607370.

The spelling of 1312560691 in words is "one billion, three hundred twelve million, five hundred sixty thousand, six hundred ninety-one".