1311535452 has 24 divisors (see below), whose sum is σ = 3105926656. Its totient is φ = 430653168.

The previous prime is 1311535391. The next prime is 1311535471. The reversal of 1311535452 is 2545351131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814828 + ... + 816435.

Almost surely, 2^1311535452 is an apocalyptic number.

1311535452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311535452 is an abundant number, since it is smaller than the sum of its proper divisors (1794391204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311535452 is a wasteful number, since it uses less digits than its factorization.

1311535452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631337 (or 1631335 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 1311535452 is about 36215.1273917406. The cubic root of 1311535452 is about 1094.6115124867.

Adding to 1311535452 its reverse (2545351131), we get a palindrome (3856886583).

The spelling of 1311535452 in words is "one billion, three hundred eleven million, five hundred thirty-five thousand, four hundred fifty-two".