1312444155 has 32 divisors (see below), whose sum is σ = 2369813760. Its totient is φ = 614391680.

The previous prime is 1312444127. The next prime is 1312444163. The reversal of 1312444155 is 5514442131.

It is not a de Polignac number, because 1312444155 - 2⁵ = 1312444123 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 132357 + ... + 141926.

It is an arithmetic number, because the mean of its divisors is an integer number (74056680).

Almost surely, 2^1312444155 is an apocalyptic number.

1312444155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312444155 is a deficient number, since it is larger than the sum of its proper divisors (1057369605).

1312444155 is a wasteful number, since it uses less digits than its factorization.

1312444155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274331.

The product of its digits is 9600, while the sum is 30.

The square root of 1312444155 is about 36227.6711230518. The cubic root of 1312444155 is about 1094.8642562281.

Adding to 1312444155 its reverse (5514442131), we get a palindrome (6826886286).

The spelling of 1312444155 in words is "one billion, three hundred twelve million, four hundred forty-four thousand, one hundred fifty-five".