109172 has 18 divisors (see below), whose sum is σ = 222642. Its totient is φ = 46704.

The previous prime is 109171. The next prime is 109199. The reversal of 109172 is 271901.

It can be written as a sum of positive squares in only one way, i.e., 70756 + 38416 = 266^2 + 196^2 .

It is a nialpdrome in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 109172.

It is not an unprimeable number, because it can be changed into a prime (109171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83 + ... + 474.

It is an arithmetic number, because the mean of its divisors is an integer number (12369).

2¹⁰⁹¹⁷² is an apocalyptic number.

It is an amenable number.

109172 is an abundant number, since it is smaller than the sum of its proper divisors (113470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109172 is a wasteful number, since it uses less digits than its factorization.

109172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 109172 is about 330.4118641938. The cubic root of 109172 is about 47.7936745772.

The spelling of 109172 in words is "one hundred nine thousand, one hundred seventy-two".