155560 has 16 divisors (see below), whose sum is σ = 350100. Its totient is φ = 62208.

The previous prime is 155557. The next prime is 155569. The reversal of 155560 is 65551.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 324 = 394^2 + 18^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905 + ... + 1984.

2¹⁵⁵⁵⁶⁰ is an apocalyptic number.

155560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155560 is an abundant number, since it is smaller than the sum of its proper divisors (194540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155560 is a wasteful number, since it uses less digits than its factorization.

155560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 3896 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 155560 is about 394.4109531948. The cubic root of 155560 is about 53.7814670622.

Subtracting from 155560 its reverse (65551), we obtain a palindrome (90009).

The spelling of 155560 in words is "one hundred fifty-five thousand, five hundred sixty".