424221421 has 8 divisors (see below), whose sum is σ = 463673504. Its totient is φ = 385743600.

The previous prime is 424221409. The next prime is 424221481. The reversal of 424221421 is 124122424.

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

It is a cyclic number.

It is not a de Polignac number, because 424221421 - 2⁷ = 424221293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 424221392 and 424221401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424221401) 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, 242655 + ... + 244396.

It is an arithmetic number, because the mean of its divisors is an integer number (57959188).

Almost surely, 2^424221421 is an apocalyptic number.

It is an amenable number.

424221421 is a deficient number, since it is larger than the sum of its proper divisors (39452083).

424221421 is a wasteful number, since it uses less digits than its factorization.

424221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487131.

The product of its digits is 1024, while the sum is 22.

The square root of 424221421 is about 20596.6361573923. The cubic root of 424221421 is about 751.3879017577.

Adding to 424221421 its reverse (124122424), we get a palindrome (548343845).

The spelling of 424221421 in words is "four hundred twenty-four million, two hundred twenty-one thousand, four hundred twenty-one".