521938 has 4 divisors (see below), whose sum is σ = 782910. Its totient is φ = 260968.

The previous prime is 521929. The next prime is 521981. The reversal of 521938 is 839125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 82369 = 663^2 + 287^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 130483 + ... + 130486.

2⁵²¹⁹³⁸ is an apocalyptic number.

521938 is a deficient number, since it is larger than the sum of its proper divisors (260972).

521938 is a wasteful number, since it uses less digits than its factorization.

521938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260971.

The product of its digits is 2160, while the sum is 28.

The square root of 521938 is about 722.4527666222. The cubic root of 521938 is about 80.5142908929.

The spelling of 521938 in words is "five hundred twenty-one thousand, nine hundred thirty-eight".