1312135155 has 24 divisors (see below), whose sum is σ = 2394072720. Its totient is φ = 662973120.

The previous prime is 1312135147. The next prime is 1312135159. The reversal of 1312135155 is 5515312131.

1312135155 is a `hidden beast` number, since 131 + 2 + 13 + 515 + 5 = 666.

It is not a de Polignac number, because 1312135155 - 2³ = 1312135147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312135159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 766476 + ... + 768185.

It is an arithmetic number, because the mean of its divisors is an integer number (99753030).

Almost surely, 2^1312135155 is an apocalyptic number.

1312135155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312135155 is a deficient number, since it is larger than the sum of its proper divisors (1081937565).

1312135155 is a wasteful number, since it uses less digits than its factorization.

1312135155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534691 (or 1534688 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1312135155 is about 36223.4061761177. The cubic root of 1312135155 is about 1094.7783250521.

Adding to 1312135155 its reverse (5515312131), we get a palindrome (6827447286).

The spelling of 1312135155 in words is "one billion, three hundred twelve million, one hundred thirty-five thousand, one hundred fifty-five".