155839 has 8 divisors (see below), whose sum is σ = 168480. Its totient is φ = 143616.

The previous prime is 155833. The next prime is 155849. The reversal of 155839 is 938551.

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

It is not a de Polignac number, because 155839 - 2⁹ = 155327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462 + ... + 1564.

It is an arithmetic number, because the mean of its divisors is an integer number (21060).

2¹⁵⁵⁸³⁹ is an apocalyptic number.

155839 is a deficient number, since it is larger than the sum of its proper divisors (12641).

155839 is a wasteful number, since it uses less digits than its factorization.

155839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209.

The product of its digits is 5400, while the sum is 31.

The square root of 155839 is about 394.7644867513. The cubic root of 155839 is about 53.8136005747.

The spelling of 155839 in words is "one hundred fifty-five thousand, eight hundred thirty-nine".