525780 has 72 divisors (see below), whose sum is σ = 1677312. Its totient is φ = 133056.

The previous prime is 525773. The next prime is 525781. The reversal of 525780 is 87525.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525781) by changing a digit.

525780 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4077 + ... + 4203.

It is an arithmetic number, because the mean of its divisors is an integer number (23296).

2⁵²⁵⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838656).

525780 is an abundant number, since it is smaller than the sum of its proper divisors (1151532).

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

525780 is a wasteful number, since it uses less digits than its factorization.

525780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 525780 is about 725.1068886723. The cubic root of 525780 is about 80.7113640985.

It can be divided in two parts, 52 and 5780, that added together give a cube (5832 = 18³).

The spelling of 525780 in words is "five hundred twenty-five thousand, seven hundred eighty".