1312845812 has 18 divisors (see below), whose sum is σ = 2424767058. Its totient is φ = 621873648.

The previous prime is 1312845763. The next prime is 1312845829. The reversal of 1312845812 is 2185482131.

It can be written as a sum of positive squares in only one way, i.e., 1060544356 + 252301456 = 32566^2 + 15884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 453143 + ... + 456030.

It is an arithmetic number, because the mean of its divisors is an integer number (134709281).

Almost surely, 2^1312845812 is an apocalyptic number.

It is an amenable number.

1312845812 is a deficient number, since it is larger than the sum of its proper divisors (1111921246).

1312845812 is a wasteful number, since it uses less digits than its factorization.

1312845812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909215 (or 909194 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 1312845812 is about 36233.2142101691. The cubic root of 1312845812 is about 1094.9759346407.

The spelling of 1312845812 in words is "one billion, three hundred twelve million, eight hundred forty-five thousand, eight hundred twelve".