424544521 has 2 divisors, whose sum is σ = 424544522. Its totient is φ = 424544520.

The previous prime is 424544509. The next prime is 424544537. The reversal of 424544521 is 125445424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307125625 + 117418896 = 17525^2 + 10836^2 .

It is a cyclic number.

It is not a de Polignac number, because 424544521 - 2⁵ = 424544489 is a prime.

It is a super-2 number, since 2×424544521² = 360476100622238882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (424544321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212272260 + 212272261.

It is an arithmetic number, because the mean of its divisors is an integer number (212272261).

Almost surely, 2^424544521 is an apocalyptic number.

It is an amenable number.

424544521 is a deficient number, since it is larger than the sum of its proper divisors (1).

424544521 is an equidigital number, since it uses as much as digits as its factorization.

424544521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25600, while the sum is 31.

The square root of 424544521 is about 20604.4781782990. The cubic root of 424544521 is about 751.5786133457.

Adding to 424544521 its reverse (125445424), we get a palindrome (549989945).

The spelling of 424544521 in words is "four hundred twenty-four million, five hundred forty-four thousand, five hundred twenty-one".