1131064256 has 84 divisors (see below), whose sum is σ = 2637486216. Its totient is φ = 479808000.

The previous prime is 1131064241. The next prime is 1131064283. The reversal of 1131064256 is 6524601311.

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 11 ways as a sum of consecutive naturals, for example, 314951 + ... + 318521.

Almost surely, 2^1131064256 is an apocalyptic number.

1131064256 is a gapful number since it is divisible by the number (16) 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 1131064256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1318743108).

1131064256 is an abundant number, since it is smaller than the sum of its proper divisors (1506421960).

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

1131064256 is a wasteful number, since it uses less digits than its factorization.

1131064256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698 (or 3681 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1131064256 is about 33631.2987557721. The cubic root of 1131064256 is about 1041.9073282821.

Adding to 1131064256 its reverse (6524601311), we get a palindrome (7655665567).

The spelling of 1131064256 in words is "one billion, one hundred thirty-one million, sixty-four thousand, two hundred fifty-six".