521524042 has 16 divisors (see below), whose sum is σ = 847637280. Its totient is φ = 239224752.

The previous prime is 521524009. The next prime is 521524061. The reversal of 521524042 is 240425125.

It is a junction number, because it is equal to n+sod(n) for n = 521523998 and 521524016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57292 + ... + 65767.

It is an arithmetic number, because the mean of its divisors is an integer number (52977330).

Almost surely, 2^521524042 is an apocalyptic number.

521524042 is a deficient number, since it is larger than the sum of its proper divisors (326113238).

521524042 is a wasteful number, since it uses less digits than its factorization.

521524042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123237.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 521524042 is about 22836.9008843144. The cubic root of 521524042 is about 804.9299950697.

Adding to 521524042 its reverse (240425125), we get a palindrome (761949167).

The spelling of 521524042 in words is "five hundred twenty-one million, five hundred twenty-four thousand, forty-two".