1139951756 has 18 divisors (see below), whose sum is σ = 2006228700. Its totient is φ = 566761680.

The previous prime is 1139951731. The next prime is 1139951773. The reversal of 1139951756 is 6571599311.

It is a self number, because there is not a number n which added to its sum of digits gives 1139951756.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126695 + ... + 135393.

It is an arithmetic number, because the mean of its divisors is an integer number (111457150).

Almost surely, 2^1139951756 is an apocalyptic number.

It is an amenable number.

1139951756 is a deficient number, since it is larger than the sum of its proper divisors (866276944).

1139951756 is an equidigital number, since it uses as much as digits as its factorization.

1139951756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9065 (or 8882 counting only the distinct ones).

The product of its digits is 255150, while the sum is 47.

The square root of 1139951756 is about 33763.1715927281. The cubic root of 1139951756 is about 1044.6291904151.

The spelling of 1139951756 in words is "one billion, one hundred thirty-nine million, nine hundred fifty-one thousand, seven hundred fifty-six".