155090 has 16 divisors (see below), whose sum is σ = 300888. Its totient is φ = 57216.

The previous prime is 155087. The next prime is 155119. The reversal of 155090 is 90551.

It can be written as a sum of positive squares in 4 ways, for example, as 97969 + 57121 = 313^2 + 239^2 .

It is a Curzon 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, 467 + ... + 726.

2¹⁵⁵⁰⁹⁰ is an apocalyptic number.

155090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155090 is a deficient number, since it is larger than the sum of its proper divisors (145798).

155090 is a wasteful number, since it uses less digits than its factorization.

155090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 155090 is about 393.8146772278. The cubic root of 155090 is about 53.7272483482.

The spelling of 155090 in words is "one hundred fifty-five thousand, ninety".