1312840252 has 6 divisors (see below), whose sum is σ = 2297470448. Its totient is φ = 656420124.

The previous prime is 1312840229. The next prime is 1312840271. The reversal of 1312840252 is 2520482131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312840252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164105028 + ... + 164105035.

Almost surely, 2^1312840252 is an apocalyptic number.

It is an amenable number.

1312840252 is a deficient number, since it is larger than the sum of its proper divisors (984630196).

1312840252 is a wasteful number, since it uses less digits than its factorization.

1312840252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328210067 (or 328210065 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1312840252 is about 36233.1374849046. The cubic root of 1312840252 is about 1094.9743888702.

The spelling of 1312840252 in words is "one billion, three hundred twelve million, eight hundred forty thousand, two hundred fifty-two".