245117 has 4 divisors (see below), whose sum is σ = 253056. Its totient is φ = 237180.

The previous prime is 245107. The next prime is 245129. The reversal of 245117 is 711542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245117 - 2⁸ = 244861 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3923 + ... + 3984.

It is an arithmetic number, because the mean of its divisors is an integer number (63264).

2²⁴⁵¹¹⁷ is an apocalyptic number.

It is an amenable number.

245117 is a deficient number, since it is larger than the sum of its proper divisors (7939).

245117 is an equidigital number, since it uses as much as digits as its factorization.

245117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7938.

The product of its digits is 280, while the sum is 20.

The square root of 245117 is about 495.0929205715. The cubic root of 245117 is about 62.5832065110.

Adding to 245117 its reverse (711542), we get a palindrome (956659).

The spelling of 245117 in words is "two hundred forty-five thousand, one hundred seventeen".