424022021 has 8 divisors (see below), whose sum is σ = 440533080. Its totient is φ = 407636992.

The previous prime is 424021903. The next prime is 424022063. The reversal of 424022021 is 120220424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28569025 + 395452996 = 5345^2 + 19886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 424022021 - 2¹⁸ = 423759877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424028021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24620 + ... + 38133.

It is an arithmetic number, because the mean of its divisors is an integer number (55066635).

Almost surely, 2^424022021 is an apocalyptic number.

It is an amenable number.

424022021 is a deficient number, since it is larger than the sum of its proper divisors (16511059).

424022021 is a wasteful number, since it uses less digits than its factorization.

424022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63015.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 424022021 is about 20591.7949921807. The cubic root of 424022021 is about 751.2701564632.

Adding to 424022021 its reverse (120220424), we get a palindrome (544242445).

The spelling of 424022021 in words is "four hundred twenty-four million, twenty-two thousand, twenty-one".