801539 has 2 divisors, whose sum is σ = 801540. Its totient is φ = 801538.

The previous prime is 801517. The next prime is 801551. The reversal of 801539 is 935108.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801539 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (801569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400769 + 400770.

It is an arithmetic number, because the mean of its divisors is an integer number (400770).

2⁸⁰¹⁵³⁹ is an apocalyptic number.

801539 is a deficient number, since it is larger than the sum of its proper divisors (1).

801539 is an equidigital number, since it uses as much as digits as its factorization.

801539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 801539 is about 895.2871047882. The cubic root of 801539 is about 92.8912669172.

The spelling of 801539 in words is "eight hundred one thousand, five hundred thirty-nine".