1151431 has 2 divisors, whose sum is σ = 1151432. Its totient is φ = 1151430.

The previous prime is 1151417. The next prime is 1151441. The reversal of 1151431 is 1341511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1151431 - 2⁵ = 1151399 is a prime.

It is a super-2 number, since 2×1151431² = 2651586695522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575715 + 575716.

It is an arithmetic number, because the mean of its divisors is an integer number (575716).

2^1151431 is an apocalyptic number.

1151431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151431 is an equidigital number, since it uses as much as digits as its factorization.

1151431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 16.

The square root of 1151431 is about 1073.0475292362. The cubic root of 1151431 is about 104.8123936453.

Adding to 1151431 its reverse (1341511), we get a palindrome (2492942).

The spelling of 1151431 in words is "one million, one hundred fifty-one thousand, four hundred thirty-one".