245717 has 8 divisors (see below), whose sum is σ = 262200. Its totient is φ = 229824.

The previous prime is 245711. The next prime is 245719. The reversal of 245717 is 717542.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 96721 = 386^2 + 311^2 .

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 245717 - 2⁶ = 245653 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 (245711) 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, 959 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (32775).

2²⁴⁵⁷¹⁷ is an apocalyptic number.

It is an amenable number.

245717 is a deficient number, since it is larger than the sum of its proper divisors (16483).

245717 is a wasteful number, since it uses less digits than its factorization.

245717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its digits is 1960, while the sum is 26.

The square root of 245717 is about 495.6984970726. The cubic root of 245717 is about 62.6342288488.

The spelling of 245717 in words is "two hundred forty-five thousand, seven hundred seventeen".