4522521 has 16 divisors (see below), whose sum is σ = 6292800. Its totient is φ = 2885568.

The previous prime is 4522517. The next prime is 4522523. The reversal of 4522521 is 1252254.

It is a happy number.

It is not a de Polignac number, because 4522521 - 2² = 4522517 is a prime.

4522521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4522523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19635 + ... + 19863.

It is an arithmetic number, because the mean of its divisors is an integer number (393300).

Almost surely, 2^4522521 is an apocalyptic number.

It is an amenable number.

4522521 is a deficient number, since it is larger than the sum of its proper divisors (1770279).

4522521 is a wasteful number, since it uses less digits than its factorization.

4522521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its digits is 800, while the sum is 21.

The square root of 4522521 is about 2126.6219692273. The cubic root of 4522521 is about 165.3713216811.

Adding to 4522521 its reverse (1252254), we get a palindrome (5774775).

The spelling of 4522521 in words is "four million, five hundred twenty-two thousand, five hundred twenty-one".