155000120 has 32 divisors (see below), whose sum is σ = 380455920. Its totient is φ = 56363520.

The previous prime is 155000107. The next prime is 155000137. The reversal of 155000120 is 21000551.

155000120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155000095 and 155000104.

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, 175697 + ... + 176576.

Almost surely, 2^155000120 is an apocalyptic number.

155000120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155000120 is an abundant number, since it is smaller than the sum of its proper divisors (225455800).

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

155000120 is a wasteful number, since it uses less digits than its factorization.

155000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352295 (or 352291 counting only the distinct ones).

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

The square root of 155000120 is about 12449.9044173038. The cubic root of 155000120 is about 537.1686741186.

Adding to 155000120 its reverse (21000551), we get a palindrome (176000671).

The spelling of 155000120 in words is "one hundred fifty-five million, one hundred twenty", and thus it is an aban number.