1155239 has 2 divisors, whose sum is σ = 1155240. Its totient is φ = 1155238.

The previous prime is 1155233. The next prime is 1155247. The reversal of 1155239 is 9325511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1155239 - 2⁴ = 1155223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577619 + 577620.

It is an arithmetic number, because the mean of its divisors is an integer number (577620).

2^1155239 is an apocalyptic number.

1155239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155239 is an equidigital number, since it uses as much as digits as its factorization.

1155239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 26.

The square root of 1155239 is about 1074.8204501218. The cubic root of 1155239 is about 104.9278113030.

The spelling of 1155239 in words is "one million, one hundred fifty-five thousand, two hundred thirty-nine".