155239 has 8 divisors (see below), whose sum is σ = 180608. Its totient is φ = 130680.

The previous prime is 155231. The next prime is 155251. The reversal of 155239 is 932551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155239 - 2³ = 155231 is a prime.

It is a Duffinian number.

155239 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304 + ... + 634.

It is an arithmetic number, because the mean of its divisors is an integer number (22576).

2¹⁵⁵²³⁹ is an apocalyptic number.

155239 is a deficient number, since it is larger than the sum of its proper divisors (25369).

155239 is an equidigital number, since it uses as much as digits as its factorization.

155239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its digits is 1350, while the sum is 25.

The square root of 155239 is about 394.0038070882. The cubic root of 155239 is about 53.7444486785.

The spelling of 155239 in words is "one hundred fifty-five thousand, two hundred thirty-nine".