1031431 has 2 divisors, whose sum is σ = 1031432. Its totient is φ = 1031430.

The previous prime is 1031423. The next prime is 1031447. The reversal of 1031431 is 1341301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031431 - 2³ = 1031423 is a prime.

It is a super-2 number, since 2×1031431² = 2127699815522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031411) by changing a digit.

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 as a sum of consecutive naturals, namely, 515715 + 515716.

It is an arithmetic number, because the mean of its divisors is an integer number (515716).

2^1031431 is an apocalyptic number.

1031431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031431 is an equidigital number, since it uses as much as digits as its factorization.

1031431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1031431 is about 1015.5939149089. The cubic root of 1031431 is about 101.0369109936.

Adding to 1031431 its reverse (1341301), we get a palindrome (2372732).

The spelling of 1031431 in words is "one million, thirty-one thousand, four hundred thirty-one".