1311254056 has 16 divisors (see below), whose sum is σ = 2809830240. Its totient is φ = 561966000.

The previous prime is 1311254041. The next prime is 1311254069. The reversal of 1311254056 is 6504521131.

It is a super-2 number, since 2×1311254056² = 3438774398752902272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11707570 + ... + 11707681.

It is an arithmetic number, because the mean of its divisors is an integer number (175614390).

Almost surely, 2^1311254056 is an apocalyptic number.

It is an amenable number.

1311254056 is an abundant number, since it is smaller than the sum of its proper divisors (1498576184).

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

1311254056 is a wasteful number, since it uses less digits than its factorization.

1311254056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23415264 (or 23415260 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1311254056 is about 36211.2421217500. The cubic root of 1311254056 is about 1094.5332222322.

Adding to 1311254056 its reverse (6504521131), we get a palindrome (7815775187).

The spelling of 1311254056 in words is "one billion, three hundred eleven million, two hundred fifty-four thousand, fifty-six".