1131431 has 16 divisors (see below), whose sum is σ = 1397760. Its totient is φ = 894240.

The previous prime is 1131421. The next prime is 1131437. The reversal of 1131431 is 1341311.

It is a cyclic number.

It is not a de Polignac number, because 1131431 - 2¹⁰ = 1130407 is a prime.

It is a super-2 number, since 2×1131431² = 2560272215522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6161 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2^1131431 is an apocalyptic number.

1131431 is a deficient number, since it is larger than the sum of its proper divisors (266329).

1131431 is a wasteful number, since it uses less digits than its factorization.

1131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254.

The product of its digits is 36, while the sum is 14.

The square root of 1131431 is about 1063.6874540954. The cubic root of 1131431 is about 104.2019927829.

Adding to 1131431 its reverse (1341311), we get a palindrome (2472742).

The spelling of 1131431 in words is "one million, one hundred thirty-one thousand, four hundred thirty-one".