155132120 has 128 divisors (see below), whose sum is σ = 421727040. Its totient is φ = 50595840.

The previous prime is 155132077. The next prime is 155132129. The reversal of 155132120 is 21231551.

It is a happy number.

155132120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 155132092 and 155132101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155132129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211274 + ... + 212006.

Almost surely, 2^155132120 is an apocalyptic number.

155132120 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 155132120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210863520).

155132120 is an abundant number, since it is smaller than the sum of its proper divisors (266594920).

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

155132120 is a wasteful number, since it uses less digits than its factorization.

155132120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 155132120 is about 12455.2045346514. The cubic root of 155132120 is about 537.3211173259.

Adding to 155132120 its reverse (21231551), we get a palindrome (176363671).

The spelling of 155132120 in words is "one hundred fifty-five million, one hundred thirty-two thousand, one hundred twenty".