155590 has 8 divisors (see below), whose sum is σ = 280080. Its totient is φ = 62232.

The previous prime is 155581. The next prime is 155593. The reversal of 155590 is 95551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155593) by changing a digit.

155590 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 7770 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (35010).

2¹⁵⁵⁵⁹⁰ is an apocalyptic number.

155590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155590 is a deficient number, since it is larger than the sum of its proper divisors (124490).

155590 is a wasteful number, since it uses less digits than its factorization.

155590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15566.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 155590 is about 394.4489827595. The cubic root of 155590 is about 53.7849241212.

The spelling of 155590 in words is "one hundred fifty-five thousand, five hundred ninety".