525204 has 30 divisors (see below), whose sum is σ = 1373834. Its totient is φ = 174960.

The previous prime is 525199. The next prime is 525209. The reversal of 525204 is 402525.

It is an interprime number because it is at equal distance from previous prime (525199) and next prime (525209).

It can be written as a sum of positive squares in only one way, i.e., 492804 + 32400 = 702^2 + 180^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525209) by changing a digit.

525204 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 9 ways as a sum of consecutive naturals, for example, 487 + ... + 1134.

2⁵²⁵²⁰⁴ is an apocalyptic number.

525204 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

525204 is an abundant number, since it is smaller than the sum of its proper divisors (848630).

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

525204 is a wasteful number, since it uses less digits than its factorization.

525204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 525204 is about 724.7095970111. The cubic root of 525204 is about 80.6818798194.

Adding to 525204 its reverse (402525), we get a palindrome (927729).

It can be divided in two parts, 525 and 204, that added together give a 6-th power (729 = 3⁶).

The spelling of 525204 in words is "five hundred twenty-five thousand, two hundred four".