1131157994 has 8 divisors (see below), whose sum is σ = 1697251908. Its totient is φ = 565407360.

The previous prime is 1131157981. The next prime is 1131158011. The reversal of 1131157994 is 4997511311.

It can be written as a sum of positive squares in 2 ways, for example, as 1112556025 + 18601969 = 33355^2 + 4313^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77417 + ... + 90860.

Almost surely, 2^1131157994 is an apocalyptic number.

1131157994 is a deficient number, since it is larger than the sum of its proper divisors (566093914).

1131157994 is a wasteful number, since it uses less digits than its factorization.

1131157994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171640.

The product of its digits is 34020, while the sum is 41.

The square root of 1131157994 is about 33632.6923394485. The cubic root of 1131157994 is about 1041.9361104993.

The spelling of 1131157994 in words is "one billion, one hundred thirty-one million, one hundred fifty-seven thousand, nine hundred ninety-four".