172857225 has 24 divisors (see below), whose sum is σ = 290483392. Its totient is φ = 90676800.

The previous prime is 172857199. The next prime is 172857227. The reversal of 172857225 is 522758271.

172857225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172857225 - 2⁶ = 172857161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172857227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14317 + ... + 23466.

Almost surely, 2^172857225 is an apocalyptic number.

172857225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172857225 is a deficient number, since it is larger than the sum of its proper divisors (117626167).

172857225 is a wasteful number, since it uses less digits than its factorization.

172857225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37857 (or 37852 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 172857225 is about 13147.5178265709. The cubic root of 172857225 is about 557.0521381830.

The spelling of 172857225 in words is "one hundred seventy-two million, eight hundred fifty-seven thousand, two hundred twenty-five".