1311560772 has 48 divisors (see below), whose sum is σ = 3163152384. Its totient is φ = 422532000.

The previous prime is 1311560753. The next prime is 1311560797. The reversal of 1311560772 is 2770651131.

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 in 15 ways as a sum of consecutive naturals, for example, 359397 + ... + 363027.

It is an arithmetic number, because the mean of its divisors is an integer number (65899008).

Almost surely, 2^1311560772 is an apocalyptic number.

1311560772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311560772 is an abundant number, since it is smaller than the sum of its proper divisors (1851591612).

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

1311560772 is a wasteful number, since it uses less digits than its factorization.

1311560772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 1311560772 is about 36215.4769677275. The cubic root of 1311560772 is about 1094.6185564913.

The spelling of 1311560772 in words is "one billion, three hundred eleven million, five hundred sixty thousand, seven hundred seventy-two".