245173 has 2 divisors, whose sum is σ = 245174. Its totient is φ = 245172.

The previous prime is 245171. The next prime is 245177. The reversal of 245173 is 371542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165649 + 79524 = 407^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 245173 - 2¹ = 245171 is a prime.

Together with 245171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122586 + 122587.

It is an arithmetic number, because the mean of its divisors is an integer number (122587).

2²⁴⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

245173 is a deficient number, since it is larger than the sum of its proper divisors (1).

245173 is an equidigital number, since it uses as much as digits as its factorization.

245173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 22.

The square root of 245173 is about 495.1494723818. The cubic root of 245173 is about 62.5879721164.

The spelling of 245173 in words is "two hundred forty-five thousand, one hundred seventy-three".