245985 has 24 divisors (see below), whose sum is σ = 424704. Its totient is φ = 121440.

The previous prime is 245983. The next prime is 245989. The reversal of 245985 is 589542.

It is not a de Polignac number, because 245985 - 2¹ = 245983 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7920 + ... + 7950.

It is an arithmetic number, because the mean of its divisors is an integer number (17696).

2²⁴⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

245985 is a deficient number, since it is larger than the sum of its proper divisors (178719).

245985 is a wasteful number, since it uses less digits than its factorization.

245985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 62 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 245985 is about 495.9687490155. The cubic root of 245985 is about 62.6569919927.

The spelling of 245985 in words is "two hundred forty-five thousand, nine hundred eighty-five".