172505025 has 96 divisors (see below), whose sum is σ = 395212800. Its totient is φ = 71668800.

The previous prime is 172505017. The next prime is 172505027. The reversal of 172505025 is 520505271.

It is a happy number.

It is not a de Polignac number, because 172505025 - 2³ = 172505017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 172505025.

It is not an unprimeable number, because it can be changed into a prime (172505027) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50316 + ... + 53634.

It is an arithmetic number, because the mean of its divisors is an integer number (4116800).

Almost surely, 2^172505025 is an apocalyptic number.

172505025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172505025 is an abundant number, since it is smaller than the sum of its proper divisors (222707775).

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

172505025 is a wasteful number, since it uses less digits than its factorization.

172505025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356 (or 3345 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 172505025 is about 13134.1168336512. The cubic root of 172505025 is about 556.6735460363.

The spelling of 172505025 in words is "one hundred seventy-two million, five hundred five thousand, twenty-five".