172655 has 8 divisors (see below), whose sum is σ = 236832. Its totient is φ = 118368.

The previous prime is 172649. The next prime is 172657. The reversal of 172655 is 556271.

172655 = T₁₅₀ + T₁₅₁ + ... + T₁₆₃.

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 172655 - 2⁸ = 172399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172657) 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, 2432 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (29604).

2¹⁷²⁶⁵⁵ is an apocalyptic number.

172655 is a deficient number, since it is larger than the sum of its proper divisors (64177).

172655 is an equidigital number, since it uses as much as digits as its factorization.

172655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945.

The product of its digits is 2100, while the sum is 26.

The square root of 172655 is about 415.5177493201. The cubic root of 172655 is about 55.6834822367.

The spelling of 172655 in words is "one hundred seventy-two thousand, six hundred fifty-five".