1155012431 has 2 divisors, whose sum is σ = 1155012432. Its totient is φ = 1155012430.

The previous prime is 1155012401. The next prime is 1155012433. The reversal of 1155012431 is 1342105511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155012431 - 2²² = 1150818127 is a prime.

It is a super-2 number, since 2×1155012431² = 2668107431529059522, which contains 22 as substring.

Together with 1155012433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155012397 and 1155012406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155012433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577506215 + 577506216.

It is an arithmetic number, because the mean of its divisors is an integer number (577506216).

Almost surely, 2^1155012431 is an apocalyptic number.

1155012431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155012431 is an equidigital number, since it uses as much as digits as its factorization.

1155012431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1155012431 is about 33985.4738233852. The cubic root of 1155012431 is about 1049.2095126690.

Adding to 1155012431 its reverse (1342105511), we get a palindrome (2497117942).

The spelling of 1155012431 in words is "one billion, one hundred fifty-five million, twelve thousand, four hundred thirty-one".