521450 has 12 divisors (see below), whose sum is σ = 969990. Its totient is φ = 208560.

The previous prime is 521447. The next prime is 521471. The reversal of 521450 is 54125.

It can be written as a sum of positive squares in 3 ways, for example, as 502681 + 18769 = 709^2 + 137^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

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 in 5 ways as a sum of consecutive naturals, for example, 5165 + ... + 5264.

2⁵²¹⁴⁵⁰ is an apocalyptic number.

521450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

521450 is a deficient number, since it is larger than the sum of its proper divisors (448540).

521450 is a wasteful number, since it uses less digits than its factorization.

521450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10441 (or 10436 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 521450 is about 722.1149492982. The cubic root of 521450 is about 80.4891900663.

Adding to 521450 its reverse (54125), we get a palindrome (575575).

The spelling of 521450 in words is "five hundred twenty-one thousand, four hundred fifty".