172245161 has 8 divisors (see below), whose sum is σ = 188600448. Its totient is φ = 156006000.

The previous prime is 172245133. The next prime is 172245187. The reversal of 172245161 is 161542271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172245161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172245121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25910 + ... + 31871.

It is an arithmetic number, because the mean of its divisors is an integer number (23575056).

Almost surely, 2^172245161 is an apocalyptic number.

172245161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172245161 is a deficient number, since it is larger than the sum of its proper divisors (16355287).

172245161 is a wasteful number, since it uses less digits than its factorization.

172245161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58063.

The product of its digits is 3360, while the sum is 29.

The square root of 172245161 is about 13124.2203958940. The cubic root of 172245161 is about 556.3938786001.

The spelling of 172245161 in words is "one hundred seventy-two million, two hundred forty-five thousand, one hundred sixty-one".