1155431 has 2 divisors, whose sum is σ = 1155432. Its totient is φ = 1155430.

The previous prime is 1155419. The next prime is 1155437. The reversal of 1155431 is 1345511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155431 is a prime.

It is a super-2 number, since 2×1155431² = 2670041591522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577715 + 577716.

It is an arithmetic number, because the mean of its divisors is an integer number (577716).

2^1155431 is an apocalyptic number.

1155431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155431 is an equidigital number, since it uses as much as digits as its factorization.

1155431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 1155431 is about 1074.9097636546. The cubic root of 1155431 is about 104.9336239599.

The spelling of 1155431 in words is "one million, one hundred fifty-five thousand, four hundred thirty-one".