424200021 has 16 divisors (see below), whose sum is σ = 647948928. Its totient is φ = 241819200.

The previous prime is 424200019. The next prime is 424200037. The reversal of 424200021 is 120002424.

It is not a de Polignac number, because 424200021 - 2¹ = 424200019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424200011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15150 + ... + 32831.

It is an arithmetic number, because the mean of its divisors is an integer number (40496808).

Almost surely, 2^424200021 is an apocalyptic number.

It is an amenable number.

424200021 is a deficient number, since it is larger than the sum of its proper divisors (223748907).

424200021 is a wasteful number, since it uses less digits than its factorization.

424200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48412.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 424200021 is about 20596.1166485335. The cubic root of 424200021 is about 751.3752668689.

Adding to 424200021 its reverse (120002424), we get a palindrome (544202445).

The spelling of 424200021 in words is "four hundred twenty-four million, two hundred thousand, twenty-one".