172573 has 2 divisors, whose sum is σ = 172574. Its totient is φ = 172572.

The previous prime is 172561. The next prime is 172583. The reversal of 172573 is 375271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 40804 = 363^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 172573 - 2⁵ = 172541 is a prime.

172573 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86286 + 86287.

It is an arithmetic number, because the mean of its divisors is an integer number (86287).

2¹⁷²⁵⁷³ is an apocalyptic number.

It is an amenable number.

172573 is a deficient number, since it is larger than the sum of its proper divisors (1).

172573 is an equidigital number, since it uses as much as digits as its factorization.

172573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1470, while the sum is 25.

The square root of 172573 is about 415.4190655230. The cubic root of 172573 is about 55.6746654854.

The spelling of 172573 in words is "one hundred seventy-two thousand, five hundred seventy-three".