1155020459 has 2 divisors, whose sum is σ = 1155020460. Its totient is φ = 1155020458.

The previous prime is 1155020411. The next prime is 1155020479. The reversal of 1155020459 is 9540205511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155020459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155020479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577510229 + 577510230.

It is an arithmetic number, because the mean of its divisors is an integer number (577510230).

Almost surely, 2^1155020459 is an apocalyptic number.

1155020459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155020459 is an equidigital number, since it uses as much as digits as its factorization.

1155020459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1155020459 is about 33985.5919324646. The cubic root of 1155020459 is about 1049.2119435330.

The spelling of 1155020459 in words is "one billion, one hundred fifty-five million, twenty thousand, four hundred fifty-nine".