1011431 has 2 divisors, whose sum is σ = 1011432. Its totient is φ = 1011430.

The previous prime is 1011407. The next prime is 1011443. The reversal of 1011431 is 1341101.

It is a strong prime.

It is an emirp because it is prime and its reverse (1341101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011431 - 2¹⁰ = 1010407 is a prime.

It is a super-2 number, since 2×1011431² = 2045985335522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505715 + 505716.

It is an arithmetic number, because the mean of its divisors is an integer number (505716).

2^1011431 is an apocalyptic number.

1011431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011431 is an equidigital number, since it uses as much as digits as its factorization.

1011431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1011431 is about 1005.6992592222. The cubic root of 1011431 is about 100.3795906198.

Adding to 1011431 its reverse (1341101), we get a palindrome (2352532).

The spelling of 1011431 in words is "one million, eleven thousand, four hundred thirty-one".