1171431 has 12 divisors (see below), whose sum is σ = 1716208. Its totient is φ = 769824.

The previous prime is 1171427. The next prime is 1171447. The reversal of 1171431 is 1341711.

It is not a de Polignac number, because 1171431 - 2² = 1171427 is a prime.

It is a super-2 number, since 2×1171431² = 2744501175522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171421) 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, 235 + ... + 1548.

2^1171431 is an apocalyptic number.

1171431 is a deficient number, since it is larger than the sum of its proper divisors (544777).

1171431 is a wasteful number, since it uses less digits than its factorization.

1171431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1859 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 1171431 is about 1082.3266604866. The cubic root of 1171431 is about 105.4157664904.

The spelling of 1171431 in words is "one million, one hundred seventy-one thousand, four hundred thirty-one".