155120 has 40 divisors (see below), whose sum is σ = 413664. Its totient is φ = 52992.

The previous prime is 155119. The next prime is 155137. The reversal of 155120 is 21551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 155095 and 155104.

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, 422 + ... + 698.

2¹⁵⁵¹²⁰ is an apocalyptic number.

155120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206832).

155120 is an abundant number, since it is smaller than the sum of its proper divisors (258544).

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

155120 is a wasteful number, since it uses less digits than its factorization.

155120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 155120 is about 393.8527643676. The cubic root of 155120 is about 53.7307123874.

Adding to 155120 its reverse (21551), we get a palindrome (176671).

The spelling of 155120 in words is "one hundred fifty-five thousand, one hundred twenty".