245790 has 24 divisors (see below), whose sum is σ = 639288. Its totient is φ = 65520.

The previous prime is 245789. The next prime is 245821. The reversal of 245790 is 97542.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1276 + ... + 1455.

It is an arithmetic number, because the mean of its divisors is an integer number (26637).

2²⁴⁵⁷⁹⁰ is an apocalyptic number.

245790 is an abundant number, since it is smaller than the sum of its proper divisors (393498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245790 is a wasteful number, since it uses less digits than its factorization.

245790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 245790 is about 495.7721250736. The cubic root of 245790 is about 62.6404308970.

It can be divided in two parts, 245 and 790, that added together give a triangular number (1035 = T₄₅).

The spelling of 245790 in words is "two hundred forty-five thousand, seven hundred ninety".