520426 has 4 divisors (see below), whose sum is σ = 780642. Its totient is φ = 260212.

The previous prime is 520423. The next prime is 520427. The reversal of 520426 is 624025.

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., 421201 + 99225 = 649^2 + 315^2 .

It is not an unprimeable number, because it can be changed into a prime (520423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130105 + ... + 130108.

2⁵²⁰⁴²⁶ is an apocalyptic number.

520426 is a deficient number, since it is larger than the sum of its proper divisors (260216).

520426 is a wasteful number, since it uses less digits than its factorization.

520426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260215.

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

The square root of 520426 is about 721.4055724764. The cubic root of 520426 is about 80.4364685263.

It can be divided in two parts, 520 and 426, that added together give a triangular number (946 = T₄₃).

The spelling of 520426 in words is "five hundred twenty thousand, four hundred twenty-six".