155845 has 8 divisors (see below), whose sum is σ = 190080. Its totient is φ = 122640.

The previous prime is 155833. The next prime is 155849. The reversal of 155845 is 548551.

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

It is not a de Polignac number, because 155845 - 2⁷ = 155717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2¹⁵⁵⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

155845 is a deficient number, since it is larger than the sum of its proper divisors (34235).

155845 is an equidigital number, since it uses as much as digits as its factorization.

155845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 4000, while the sum is 28.

The square root of 155845 is about 394.7720861459. The cubic root of 155845 is about 53.8142911966.

It can be divided in two parts, 155 and 845, that added together give a cube (1000 = 10³).

The spelling of 155845 in words is "one hundred fifty-five thousand, eight hundred forty-five".