521434 has 4 divisors (see below), whose sum is σ = 782154. Its totient is φ = 260716.

The previous prime is 521429. The next prime is 521447. The reversal of 521434 is 434125.

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., 494209 + 27225 = 703^2 + 165^2 .

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

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, 130357 + ... + 130360.

2⁵²¹⁴³⁴ is an apocalyptic number.

521434 is a deficient number, since it is larger than the sum of its proper divisors (260720).

521434 is a wasteful number, since it uses less digits than its factorization.

521434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260719.

The product of its digits is 480, while the sum is 19.

The square root of 521434 is about 722.1038706447. The cubic root of 521434 is about 80.4883668233.

Adding to 521434 its reverse (434125), we get a palindrome (955559).

The spelling of 521434 in words is "five hundred twenty-one thousand, four hundred thirty-four".