525421128 has 64 divisors (see below), whose sum is σ = 1357424640. Its totient is φ = 169372224.

The previous prime is 525421123. The next prime is 525421157. The reversal of 525421128 is 821124525.

It is a junction number, because it is equal to n+sod(n) for n = 525421095 and 525421104.

It is not an unprimeable number, because it can be changed into a prime (525421123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103825 + ... + 108767.

It is an arithmetic number, because the mean of its divisors is an integer number (21209760).

Almost surely, 2^525421128 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 525421128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678712320).

525421128 is an abundant number, since it is smaller than the sum of its proper divisors (832003512).

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

525421128 is a wasteful number, since it uses less digits than its factorization.

525421128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098 (or 5094 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 525421128 is about 22922.0663989964. The cubic root of 525421128 is about 806.9299669436.

The spelling of 525421128 in words is "five hundred twenty-five million, four hundred twenty-one thousand, one hundred twenty-eight".