172245 has 8 divisors (see below), whose sum is σ = 275616. Its totient is φ = 91856.

The previous prime is 172243. The next prime is 172259. The reversal of 172245 is 542271.

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

It is a cyclic number.

It is not a de Polignac number, because 172245 - 2¹ = 172243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172243) 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, 5727 + ... + 5756.

It is an arithmetic number, because the mean of its divisors is an integer number (34452).

2¹⁷²²⁴⁵ is an apocalyptic number.

172245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172245 is a deficient number, since it is larger than the sum of its proper divisors (103371).

172245 is a wasteful number, since it uses less digits than its factorization.

172245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11491.

The product of its digits is 560, while the sum is 21.

The square root of 172245 is about 415.0240956860. The cubic root of 172245 is about 55.6393705244.

The spelling of 172245 in words is "one hundred seventy-two thousand, two hundred forty-five".