4524021 has 6 divisors (see below), whose sum is σ = 6534710. Its totient is φ = 3016008.

The previous prime is 4524019. The next prime is 4524043. The reversal of 4524021 is 1204254.

It can be written as a sum of positive squares in only one way, i.e., 4284900 + 239121 = 2070^2 + 489^2 .

It is not a de Polignac number, because 4524021 - 2¹ = 4524019 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 = 4523985 and 4524003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4524011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 251326 + ... + 251343.

Almost surely, 2^4524021 is an apocalyptic number.

It is an amenable number.

4524021 is a deficient number, since it is larger than the sum of its proper divisors (2010689).

4524021 is a wasteful number, since it uses less digits than its factorization.

4524021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502675 (or 502672 counting only the distinct ones).

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

The square root of 4524021 is about 2126.9746119782. The cubic root of 4524021 is about 165.3896027507.

Adding to 4524021 its reverse (1204254), we get a palindrome (5728275).

The spelling of 4524021 in words is "four million, five hundred twenty-four thousand, twenty-one".