525540 has 48 divisors (see below), whose sum is σ = 1552320. Its totient is φ = 132480.

The previous prime is 525533. The next prime is 525541. The reversal of 525540 is 45525.

It is not an unprimeable number, because it can be changed into a prime (525541) by changing a digit.

525540 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 15 ways as a sum of consecutive naturals, for example, 910 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2⁵²⁵⁵⁴⁰ 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 525540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776160).

525540 is an abundant number, since it is smaller than the sum of its proper divisors (1026780).

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

525540 is a wasteful number, since it uses less digits than its factorization.

525540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 525540 is about 724.9413769402. The cubic root of 525540 is about 80.6990816004.

The spelling of 525540 in words is "five hundred twenty-five thousand, five hundred forty".