245580 has 24 divisors (see below), whose sum is σ = 687792. Its totient is φ = 65472.

The previous prime is 245563. The next prime is 245587. The reversal of 245580 is 85542.

245580 = 58² + 59² + ... + 97².

It is a self number, because there is not a number n which added to its sum of digits gives 245580.

It is not an unprimeable number, because it can be changed into a prime (245587) by changing a digit.

245580 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 2106.

It is an arithmetic number, because the mean of its divisors is an integer number (28658).

2²⁴⁵⁵⁸⁰ is an apocalyptic number.

245580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245580 is an abundant number, since it is smaller than the sum of its proper divisors (442212).

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

245580 is a wasteful number, since it uses less digits than its factorization.

245580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105 (or 4103 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 245580 is about 495.5602889659. The cubic root of 245580 is about 62.6225860719.

The spelling of 245580 in words is "two hundred forty-five thousand, five hundred eighty".