1156917312 has 126 divisors (see below), whose sum is σ = 3379098398. Its totient is φ = 378445824.

The previous prime is 1156917299. The next prime is 1156917343. The reversal of 1156917312 is 2137196511.

It is a happy number.

1156917312 is a `hidden beast` number, since 11 + 569 + 1 + 73 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1154912256 + 2005056 = 33984^2 + 1416^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 17 ways as a sum of consecutive naturals, for example, 2004768 + ... + 2005344.

Almost surely, 2^1156917312 is an apocalyptic number.

1156917312 is a gapful number since it is divisible by the number (12) 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 1156917312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689549199).

1156917312 is an abundant number, since it is smaller than the sum of its proper divisors (2222181086).

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

1156917312 is an equidigital number, since it uses as much as digits as its factorization.

1156917312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 641 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 1156917312 is about 34013.4872072829. The cubic root of 1156917312 is about 1049.7859917585.

The spelling of 1156917312 in words is "one billion, one hundred fifty-six million, nine hundred seventeen thousand, three hundred twelve".