155142120 has 64 divisors (see below), whose sum is σ = 531918720. Its totient is φ = 35460864.

The previous prime is 155142103. The next prime is 155142131. The reversal of 155142120 is 21241551.

155142120 = 1121² + 1122² + ... + 1232².

155142120 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 (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91507 + ... + 93186.

It is an arithmetic number, because the mean of its divisors is an integer number (8311230).

Almost surely, 2^155142120 is an apocalyptic number.

155142120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155142120 is an abundant number, since it is smaller than the sum of its proper divisors (376776600).

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

155142120 is a wasteful number, since it uses less digits than its factorization.

155142120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184714 (or 184710 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 155142120 is about 12455.6059667926. The cubic root of 155142120 is about 537.3326625295.

Adding to 155142120 its reverse (21241551), we get a palindrome (176383671).

It can be divided in two parts, 1551421 and 20, that added together give a triangular number (1551441 = T₁₇₆₁).

The spelling of 155142120 in words is "one hundred fifty-five million, one hundred forty-two thousand, one hundred twenty".