1312115545 has 32 divisors (see below), whose sum is σ = 1744630272. Its totient is φ = 941213952.

The previous prime is 1312115507. The next prime is 1312115587. The reversal of 1312115545 is 5455112131.

It is a cyclic number.

It is not a de Polignac number, because 1312115545 - 2¹³ = 1312107353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 549424 + ... + 551806.

It is an arithmetic number, because the mean of its divisors is an integer number (54519696).

Almost surely, 2^1312115545 is an apocalyptic number.

It is an amenable number.

1312115545 is a deficient number, since it is larger than the sum of its proper divisors (432514727).

1312115545 is a wasteful number, since it uses less digits than its factorization.

1312115545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

The product of its digits is 3000, while the sum is 28.

The square root of 1312115545 is about 36223.1354937697. The cubic root of 1312115545 is about 1094.7728711653.

Adding to 1312115545 its reverse (5455112131), we get a palindrome (6767227676).

The spelling of 1312115545 in words is "one billion, three hundred twelve million, one hundred fifteen thousand, five hundred forty-five".