525450 has 48 divisors (see below), whose sum is σ = 1357056. Its totient is φ = 134400.

The previous prime is 525439. The next prime is 525457. The reversal of 525450 is 54525.

It is a super-3 number, since 3×525450³ = 435226613335875000, which contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (525457) by changing a digit.

525450 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 (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4594 + ... + 4706.

It is an arithmetic number, because the mean of its divisors is an integer number (28272).

2⁵²⁵⁴⁵⁰ is an apocalyptic number.

525450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 525450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678528).

525450 is an abundant number, since it is smaller than the sum of its proper divisors (831606).

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

525450 is a wasteful number, since it uses less digits than its factorization.

525450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 154 counting only the distinct ones).

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

The square root of 525450 is about 724.8793002976. The cubic root of 525450 is about 80.6944746996.

Adding to 525450 its reverse (54525), we get a palindrome (579975).

The spelling of 525450 in words is "five hundred twenty-five thousand, four hundred fifty".