155870 has 32 divisors (see below), whose sum is σ = 332640. Its totient is φ = 51840.

The previous prime is 155863. The next prime is 155887. The reversal of 155870 is 78551.

155870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1376 + ... + 1484.

It is an arithmetic number, because the mean of its divisors is an integer number (10395).

2¹⁵⁵⁸⁷⁰ is an apocalyptic number.

155870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155870 is an abundant number, since it is smaller than the sum of its proper divisors (176770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155870 is a wasteful number, since it uses less digits than its factorization.

155870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 155870 is about 394.8037487157. The cubic root of 155870 is about 53.8171685969.

155870 divided by its sum of digits (26) gives a palindrome (5995).

It can be divided in two parts, 15 and 5870, that added together give a palindrome (5885).

The spelling of 155870 in words is "one hundred fifty-five thousand, eight hundred seventy".