526138 has 8 divisors (see below), whose sum is σ = 792288. Its totient is φ = 262044.

The previous prime is 526121. The next prime is 526139. The reversal of 526138 is 831625.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (526139) by changing a digit.

526138 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 3 ways as a sum of consecutive naturals, for example, 745 + ... + 1267.

It is an arithmetic number, because the mean of its divisors is an integer number (99036).

2⁵²⁶¹³⁸ is an apocalyptic number.

526138 is a deficient number, since it is larger than the sum of its proper divisors (266150).

526138 is a wasteful number, since it uses less digits than its factorization.

526138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 1440, while the sum is 25.

The square root of 526138 is about 725.3537068217. The cubic root of 526138 is about 80.7296785473.

The spelling of 526138 in words is "five hundred twenty-six thousand, one hundred thirty-eight".