245539 has 6 divisors (see below), whose sum is σ = 285684. Its totient is φ = 210420.

The previous prime is 245533. The next prime is 245561. The reversal of 245539 is 935542.

It is not a de Polignac number, because 245539 - 2⁷ = 245411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2457 + ... + 2554.

It is an arithmetic number, because the mean of its divisors is an integer number (47614).

2²⁴⁵⁵³⁹ is an apocalyptic number.

245539 is a deficient number, since it is larger than the sum of its proper divisors (40145).

245539 is an equidigital number, since it uses as much as digits as its factorization.

245539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5018 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 245539 is about 495.5189199213. The cubic root of 245539 is about 62.6191008955.

It can be divided in two parts, 245 and 539, that added together give a square (784 = 28²).

The spelling of 245539 in words is "two hundred forty-five thousand, five hundred thirty-nine".