155285 has 8 divisors (see below), whose sum is σ = 200760. Its totient is φ = 114624.

The previous prime is 155269. The next prime is 155291. The reversal of 155285 is 582551.

It can be written as a sum of positive squares in 4 ways, for example, as 49 + 155236 = 7^2 + 394^2 .

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 155285 - 2⁴ = 155269 is a prime.

It is a super-3 number, since 3×155285³ = 11233362503322375, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130 + ... + 1259.

It is an arithmetic number, because the mean of its divisors is an integer number (25095).

2¹⁵⁵²⁸⁵ is an apocalyptic number.

It is an amenable number.

155285 is a deficient number, since it is larger than the sum of its proper divisors (45475).

155285 is a wasteful number, since it uses less digits than its factorization.

155285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407.

The product of its digits is 2000, while the sum is 26.

The square root of 155285 is about 394.0621778349. The cubic root of 155285 is about 53.7497566241.

The spelling of 155285 in words is "one hundred fifty-five thousand, two hundred eighty-five".