521546 has 4 divisors (see below), whose sum is σ = 782322. Its totient is φ = 260772.

The previous prime is 521539. The next prime is 521551. The reversal of 521546 is 645125.

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., 373321 + 148225 = 611^2 + 385^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130385 + ... + 130388.

2⁵²¹⁵⁴⁶ is an apocalyptic number.

521546 is a deficient number, since it is larger than the sum of its proper divisors (260776).

521546 is a wasteful number, since it uses less digits than its factorization.

521546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260775.

The product of its digits is 1200, while the sum is 23.

The square root of 521546 is about 722.1814176507. The cubic root of 521546 is about 80.4941291708.

The spelling of 521546 in words is "five hundred twenty-one thousand, five hundred forty-six".