1312501325 has 24 divisors (see below), whose sum is σ = 1707206208. Its totient is φ = 999060480.

The previous prime is 1312501321. The next prime is 1312501331. The reversal of 1312501325 is 5231052131.

It is a happy number.

It is not a de Polignac number, because 1312501325 - 2² = 1312501321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312501325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312501321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105062 + ... + 116888.

It is an arithmetic number, because the mean of its divisors is an integer number (71133592).

Almost surely, 2^1312501325 is an apocalyptic number.

It is an amenable number.

1312501325 is a deficient number, since it is larger than the sum of its proper divisors (394704883).

1312501325 is a wasteful number, since it uses less digits than its factorization.

1312501325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12053 (or 12048 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1312501325 is about 36228.4601522063. The cubic root of 1312501325 is about 1094.8801534076.

Adding to 1312501325 its reverse (5231052131), we get a palindrome (6543553456).

The spelling of 1312501325 in words is "one billion, three hundred twelve million, five hundred one thousand, three hundred twenty-five".