245515 has 4 divisors (see below), whose sum is σ = 294624. Its totient is φ = 196408.

The previous prime is 245513. The next prime is 245519. The reversal of 245515 is 515542.

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

It is a cyclic number.

It is not a de Polignac number, because 245515 - 2¹ = 245513 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245513) 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, 24547 + ... + 24556.

It is an arithmetic number, because the mean of its divisors is an integer number (73656).

2²⁴⁵⁵¹⁵ is an apocalyptic number.

245515 is a deficient number, since it is larger than the sum of its proper divisors (49109).

245515 is an equidigital number, since it uses as much as digits as its factorization.

245515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49108.

The product of its digits is 1000, while the sum is 22.

The square root of 245515 is about 495.4947022926. The cubic root of 245515 is about 62.6170606121.

The spelling of 245515 in words is "two hundred forty-five thousand, five hundred fifteen".