155085 has 24 divisors (see below), whose sum is σ = 290016. Its totient is φ = 70560.

The previous prime is 155083. The next prime is 155087. The reversal of 155085 is 580551.

155085 = 120² + 121² + ... + 129².

It is an interprime number because it is at equal distance from previous prime (155083) and next prime (155087).

It is not a de Polignac number, because 155085 - 2¹ = 155083 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155081) 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 23 ways as a sum of consecutive naturals, for example, 630 + ... + 840.

It is an arithmetic number, because the mean of its divisors is an integer number (12084).

2¹⁵⁵⁰⁸⁵ is an apocalyptic number.

155085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155085 is a deficient number, since it is larger than the sum of its proper divisors (134931).

155085 is a wasteful number, since it uses less digits than its factorization.

155085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 155085 is about 393.8083290130. The cubic root of 155085 is about 53.7266709649.

The spelling of 155085 in words is "one hundred fifty-five thousand, eighty-five".