172901225 has 12 divisors (see below), whose sum is σ = 245025984. Its totient is φ = 118560720.

The previous prime is 172901153. The next prime is 172901227. The reversal of 172901225 is 522109271.

It is not a de Polignac number, because 172901225 - 2¹⁰ = 172900201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172901227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493829 + ... + 494178.

It is an arithmetic number, because the mean of its divisors is an integer number (20418832).

Almost surely, 2^172901225 is an apocalyptic number.

It is an amenable number.

172901225 is a deficient number, since it is larger than the sum of its proper divisors (72124759).

172901225 is an equidigital number, since it uses as much as digits as its factorization.

172901225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988024 (or 988019 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 172901225 is about 13149.1910397560. The cubic root of 172901225 is about 557.0993991807.

The spelling of 172901225 in words is "one hundred seventy-two million, nine hundred one thousand, two hundred twenty-five".