1320312855 has 16 divisors (see below), whose sum is σ = 2125154304. Its totient is φ = 699948960.

The previous prime is 1320312809. The next prime is 1320312857. The reversal of 1320312855 is 5582130231.

It is not a de Polignac number, because 1320312855 - 2⁷ = 1320312727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320312857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261031 + ... + 266040.

It is an arithmetic number, because the mean of its divisors is an integer number (132822144).

Almost surely, 2^1320312855 is an apocalyptic number.

1320312855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1320312855 is a deficient number, since it is larger than the sum of its proper divisors (804841449).

1320312855 is a wasteful number, since it uses less digits than its factorization.

1320312855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527246.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1320312855 is about 36336.1095193198. The cubic root of 1320312855 is about 1097.0479677393.

The spelling of 1320312855 in words is "one billion, three hundred twenty million, three hundred twelve thousand, eight hundred fifty-five".