1312506945 has 12 divisors (see below), whose sum is σ = 2275012116. Its totient is φ = 700003680.

The previous prime is 1312506919. The next prime is 1312506959. The reversal of 1312506945 is 5496052131.

It can be written as a sum of positive squares in 2 ways, for example, as 299739969 + 1012766976 = 17313^2 + 31824^2 .

It is not a de Polignac number, because 1312506945 - 2¹⁷ = 1312375873 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14583366 + ... + 14583455.

It is an arithmetic number, because the mean of its divisors is an integer number (189584343).

Almost surely, 2^1312506945 is an apocalyptic number.

1312506945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312506945 is a deficient number, since it is larger than the sum of its proper divisors (962505171).

1312506945 is a wasteful number, since it uses less digits than its factorization.

1312506945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29166832 (or 29166829 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1312506945 is about 36228.5377154530. The cubic root of 1312506945 is about 1094.8817161280.

The spelling of 1312506945 in words is "one billion, three hundred twelve million, five hundred six thousand, nine hundred forty-five".