245017 has 4 divisors (see below), whose sum is σ = 247860. Its totient is φ = 242176.

The previous prime is 244997. The next prime is 245023. The reversal of 245017 is 710542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 99856 = 381^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 245017 - 2⁷ = 244889 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 244985 and 245003.

It is not an unprimeable number, because it can be changed into a prime (245087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (61965).

2²⁴⁵⁰¹⁷ is an apocalyptic number.

It is an amenable number.

245017 is a deficient number, since it is larger than the sum of its proper divisors (2843).

245017 is an equidigital number, since it uses as much as digits as its factorization.

245017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 245017 is about 494.9919191260. The cubic root of 245017 is about 62.5746946957.

Adding to 245017 its reverse (710542), we get a palindrome (955559).

It can be divided in two parts, 24 and 5017, that added together give a square (5041 = 71²).

The spelling of 245017 in words is "two hundred forty-five thousand, seventeen".