522756 has 36 divisors (see below), whose sum is σ = 1424332. Its totient is φ = 160704.

The previous prime is 522749. The next prime is 522757. The reversal of 522756 is 657225.

522756 = T₁₁₅ + T₁₁₆ + ... + T₁₆₆.

It can be written as a sum of positive squares in 2 ways, for example, as 46656 + 476100 = 216^2 + 690^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (522757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91 + ... + 1026.

2⁵²²⁷⁵⁶ 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 522756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712166).

522756 is an abundant number, since it is smaller than the sum of its proper divisors (901576).

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

522756 is a wasteful number, since it uses less digits than its factorization.

522756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1135 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 522756 is about 723.0186719581. The cubic root of 522756 is about 80.5563305690.

Subtracting from 522756 its sum of digits (27), we obtain a square (522729 = 723²).

The spelling of 522756 in words is "five hundred twenty-two thousand, seven hundred fifty-six".