1312642045 has 16 divisors (see below), whose sum is σ = 1850550912. Its totient is φ = 881213760.

The previous prime is 1312642031. The next prime is 1312642061. The reversal of 1312642045 is 5402462131.

It is not a de Polignac number, because 1312642045 - 2¹¹ = 1312639997 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 15 ways as a sum of consecutive naturals, for example, 917217 + ... + 918646.

It is an arithmetic number, because the mean of its divisors is an integer number (115659432).

Almost surely, 2^1312642045 is an apocalyptic number.

It is an amenable number.

1312642045 is a deficient number, since it is larger than the sum of its proper divisors (537908867).

1312642045 is a wasteful number, since it uses less digits than its factorization.

1312642045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835892.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1312642045 is about 36230.4022196829. The cubic root of 1312642045 is about 1094.9192812485.

The spelling of 1312642045 in words is "one billion, three hundred twelve million, six hundred forty-two thousand, forty-five".