1311354520 has 128 divisors (see below), whose sum is σ = 3466229760. Its totient is φ = 437184000.

The previous prime is 1311354487. The next prime is 1311354533. The reversal of 1311354520 is 254531131.

It is a happy number.

It is a congruent 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, 3302962 + ... + 3303358.

It is an arithmetic number, because the mean of its divisors is an integer number (27079920).

Almost surely, 2^1311354520 is an apocalyptic number.

1311354520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311354520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1733114880).

1311354520 is an abundant number, since it is smaller than the sum of its proper divisors (2154875240).

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

1311354520 is a wasteful number, since it uses less digits than its factorization.

1311354520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1311354520 is about 36212.6292886888. The cubic root of 1311354520 is about 1094.5611747044.

Adding to 1311354520 its reverse (254531131), we get a palindrome (1565885651).

The spelling of 1311354520 in words is "one billion, three hundred eleven million, three hundred fifty-four thousand, five hundred twenty".