520421259 has 4 divisors (see below), whose sum is σ = 693895016. Its totient is φ = 346947504.

The previous prime is 520421233. The next prime is 520421261. The reversal of 520421259 is 952124025.

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

It is not a de Polignac number, because 520421259 - 2¹³ = 520413067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520421959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86736874 + ... + 86736879.

It is an arithmetic number, because the mean of its divisors is an integer number (173473754).

Almost surely, 2^520421259 is an apocalyptic number.

520421259 is a deficient number, since it is larger than the sum of its proper divisors (173473757).

520421259 is a wasteful number, since it uses less digits than its factorization.

520421259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173473756.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 520421259 is about 22812.7433466473. The cubic root of 520421259 is about 804.3622427097.

It can be divided in two parts, 52042 and 1259, that added together give a triangular number (53301 = T₃₂₆).

The spelling of 520421259 in words is "five hundred twenty million, four hundred twenty-one thousand, two hundred fifty-nine".