1312305252 has 12 divisors (see below), whose sum is σ = 3062045616. Its totient is φ = 437435080.

The previous prime is 1312305229. The next prime is 1312305289. The reversal of 1312305252 is 2525032131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54679374 + ... + 54679397.

It is an arithmetic number, because the mean of its divisors is an integer number (255170468).

Almost surely, 2^1312305252 is an apocalyptic number.

1312305252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312305252 is an abundant number, since it is smaller than the sum of its proper divisors (1749740364).

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

1312305252 is a wasteful number, since it uses less digits than its factorization.

1312305252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109358778 (or 109358776 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1312305252 is about 36225.7539880125. The cubic root of 1312305252 is about 1094.8256297478.

Adding to 1312305252 its reverse (2525032131), we get a palindrome (3837337383).

The spelling of 1312305252 in words is "one billion, three hundred twelve million, three hundred five thousand, two hundred fifty-two".