168601225 has 24 divisors (see below), whose sum is σ = 230657112. Its totient is φ = 121459200.

The previous prime is 168601217. The next prime is 168601241. The reversal of 168601225 is 522106861.

It can be written as a sum of positive squares in 12 ways, for example, as 162103824 + 6497401 = 12732^2 + 2549^2 .

It is not a de Polignac number, because 168601225 - 2³ = 168601217 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6999 + ... + 19651.

It is an arithmetic number, because the mean of its divisors is an integer number (9610713).

Almost surely, 2^168601225 is an apocalyptic number.

It is an amenable number.

168601225 is a deficient number, since it is larger than the sum of its proper divisors (62055887).

168601225 is a wasteful number, since it uses less digits than its factorization.

168601225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12717 (or 12712 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 168601225 is about 12984.6534416595. The cubic root of 168601225 is about 552.4422794815.

The spelling of 168601225 in words is "one hundred sixty-eight million, six hundred one thousand, two hundred twenty-five".