524004021 has 12 divisors (see below), whose sum is σ = 796731520. Its totient is φ = 330949800.

The previous prime is 524004017. The next prime is 524004029. The reversal of 524004021 is 120400425.

It is not a de Polignac number, because 524004021 - 2² = 524004017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 524003985 and 524004003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524004029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1532005 + ... + 1532346.

Almost surely, 2^524004021 is an apocalyptic number.

It is an amenable number.

524004021 is a deficient number, since it is larger than the sum of its proper divisors (272727499).

524004021 is a wasteful number, since it uses less digits than its factorization.

524004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064376 (or 3064373 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 524004021 is about 22891.1341134510. The cubic root of 524004021 is about 806.2038600601.

Adding to 524004021 its reverse (120400425), we get a palindrome (644404446).

The spelling of 524004021 in words is "five hundred twenty-four million, four thousand, twenty-one".