1312501572 has 36 divisors (see below), whose sum is σ = 3330070380. Its totient is φ = 435870912.

The previous prime is 1312501571. The next prime is 1312501607. The reversal of 1312501572 is 2751052131.

It can be written as a sum of positive squares in 2 ways, for example, as 586414656 + 726086916 = 24216^2 + 26946^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1312501571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58083 + ... + 77450.

It is an arithmetic number, because the mean of its divisors is an integer number (92501955).

Almost surely, 2^1312501572 is an apocalyptic number.

1312501572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312501572 is an abundant number, since it is smaller than the sum of its proper divisors (2017568808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312501572 is a wasteful number, since it uses less digits than its factorization.

1312501572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135812 (or 135807 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1312501572 is about 36228.4635611283. The cubic root of 1312501572 is about 1094.8802220895.

The spelling of 1312501572 in words is "one billion, three hundred twelve million, five hundred one thousand, five hundred seventy-two".