1312563825 has 24 divisors (see below), whose sum is σ = 2411229600. Its totient is φ = 700033680.

The previous prime is 1312563823. The next prime is 1312563827. The reversal of 1312563825 is 5283652131.

1312563825 is a `hidden beast` number, since 1 + 3 + 12 + 5 + 638 + 2 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1312563823) and next prime (1312563827).

It is not a de Polignac number, because 1312563825 - 2¹ = 1312563823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312563825.

It is not an unprimeable number, because it can be changed into a prime (1312563823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 971595 + ... + 972944.

It is an arithmetic number, because the mean of its divisors is an integer number (100467900).

Almost surely, 2^1312563825 is an apocalyptic number.

1312563825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312563825 is a deficient number, since it is larger than the sum of its proper divisors (1098665775).

1312563825 is a wasteful number, since it uses less digits than its factorization.

1312563825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944558 (or 1944547 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1312563825 is about 36229.3227234515. The cubic root of 1312563825 is about 1094.8975321642.

The spelling of 1312563825 in words is "one billion, three hundred twelve million, five hundred sixty-three thousand, eight hundred twenty-five".