525138 has 8 divisors (see below), whose sum is σ = 1050288. Its totient is φ = 175044.

The previous prime is 525137. The next prime is 525143. The reversal of 525138 is 831525.

It is a sphenic number, since it is the product of 3 distinct primes.

525138 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 525138.

It is not an unprimeable number, because it can be changed into a prime (525137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43756 + ... + 43767.

It is an arithmetic number, because the mean of its divisors is an integer number (131286).

2⁵²⁵¹³⁸ is an apocalyptic number.

525138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

525138 is a wasteful number, since it uses less digits than its factorization.

525138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87528.

The product of its digits is 1200, while the sum is 24.

The square root of 525138 is about 724.6640600996. The cubic root of 525138 is about 80.6785000361.

The spelling of 525138 in words is "five hundred twenty-five thousand, one hundred thirty-eight".