172450161 has 32 divisors (see below), whose sum is σ = 279278720. Its totient is φ = 104524992.

The previous prime is 172450147. The next prime is 172450169. The reversal of 172450161 is 161054271.

It is a happy number.

It is not a de Polignac number, because 172450161 - 2¹¹ = 172448113 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172450169) 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 31 ways as a sum of consecutive naturals, for example, 19851 + ... + 27183.

It is an arithmetic number, because the mean of its divisors is an integer number (8727460).

Almost surely, 2^172450161 is an apocalyptic number.

It is an amenable number.

172450161 is a deficient number, since it is larger than the sum of its proper divisors (106828559).

172450161 is a wasteful number, since it uses less digits than its factorization.

172450161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7422 (or 7416 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 172450161 is about 13132.0280611945. The cubic root of 172450161 is about 556.6145244207.

The spelling of 172450161 in words is "one hundred seventy-two million, four hundred fifty thousand, one hundred sixty-one".