1312332549 has 16 divisors (see below), whose sum is σ = 1921665600. Its totient is φ = 790012160.

The previous prime is 1312332521. The next prime is 1312332557. The reversal of 1312332549 is 9452332131.

It is a cyclic number.

It is not a de Polignac number, because 1312332549 - 2⁷ = 1312332421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312332559) 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, 128532 + ... + 138365.

It is an arithmetic number, because the mean of its divisors is an integer number (120104100).

Almost surely, 2^1312332549 is an apocalyptic number.

It is an amenable number.

1312332549 is a deficient number, since it is larger than the sum of its proper divisors (609333051).

1312332549 is a wasteful number, since it uses less digits than its factorization.

1312332549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267060.

The product of its digits is 19440, while the sum is 33.

The square root of 1312332549 is about 36226.1307483976. The cubic root of 1312332549 is about 1094.8332207784.

The spelling of 1312332549 in words is "one billion, three hundred twelve million, three hundred thirty-two thousand, five hundred forty-nine".