1161250431 has 12 divisors (see below), whose sum is σ = 1701888216. Its totient is φ = 703787920.

The previous prime is 1161250411. The next prime is 1161250459. The reversal of 1161250431 is 1340521611.

It is a happy number.

It is not a de Polignac number, because 1161250431 - 2⁶ = 1161250367 is a prime.

It is a super-2 number, since 2×1161250431² = 2697005126995371522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161250411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1599156 + ... + 1599881.

It is an arithmetic number, because the mean of its divisors is an integer number (141824018).

Almost surely, 2^1161250431 is an apocalyptic number.

1161250431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1161250431 is a deficient number, since it is larger than the sum of its proper divisors (540637785).

1161250431 is a wasteful number, since it uses less digits than its factorization.

1161250431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199062 (or 3199051 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1161250431 is about 34077.1247466684. The cubic root of 1161250431 is about 1051.0949819751.

The spelling of 1161250431 in words is "one billion, one hundred sixty-one million, two hundred fifty thousand, four hundred thirty-one".