421500424 has 16 divisors (see below), whose sum is σ = 793015020. Its totient is φ = 210029760.

The previous prime is 421500421. The next prime is 421500433. The reversal of 421500424 is 424005124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 419512324 + 1988100 = 20482^2 + 1410^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421500395 and 421500404.

It is not an unprimeable number, because it can be changed into a prime (421500421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87567 + ... + 92254.

Almost surely, 2^421500424 is an apocalyptic number.

It is an amenable number.

421500424 is a deficient number, since it is larger than the sum of its proper divisors (371514596).

421500424 is a wasteful number, since it uses less digits than its factorization.

421500424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180120 (or 180116 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 421500424 is about 20530.4754937629. The cubic root of 421500424 is about 749.7779633098. Note that the first 3 decimals are identical.

Adding to 421500424 its reverse (424005124), we get a palindrome (845505548).

The spelling of 421500424 in words is "four hundred twenty-one million, five hundred thousand, four hundred twenty-four".