155128925 has 24 divisors (see below), whose sum is σ = 220819200. Its totient is φ = 105900480.

The previous prime is 155128913. The next prime is 155128931. The reversal of 155128925 is 529821551.

It is a happy number.

It is not a de Polignac number, because 155128925 - 2⁸ = 155128669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39971 + ... + 43679.

It is an arithmetic number, because the mean of its divisors is an integer number (9200800).

Almost surely, 2^155128925 is an apocalyptic number.

It is an amenable number.

155128925 is a deficient number, since it is larger than the sum of its proper divisors (65690275).

155128925 is a wasteful number, since it uses less digits than its factorization.

155128925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965 (or 3960 counting only the distinct ones).

The product of its digits is 36000, while the sum is 38.

The square root of 155128925 is about 12455.0762743550. The cubic root of 155128925 is about 537.3174285288.

The spelling of 155128925 in words is "one hundred fifty-five million, one hundred twenty-eight thousand, nine hundred twenty-five".