421421344 has 12 divisors (see below), whose sum is σ = 829673334. Its totient is φ = 210710656.

The previous prime is 421421333. The next prime is 421421353. The reversal of 421421344 is 443124124.

It can be written as a sum of positive squares in only one way, i.e., 369408400 + 52012944 = 19220^2 + 7212^2 .

It is an unprimeable number.

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, 6584677 + ... + 6584740.

Almost surely, 2^421421344 is an apocalyptic number.

It is an amenable number.

421421344 is a deficient number, since it is larger than the sum of its proper divisors (408251990).

421421344 is a wasteful number, since it uses less digits than its factorization.

421421344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13169427 (or 13169419 counting only the distinct ones).

The product of its digits is 3072, while the sum is 25.

The square root of 421421344 is about 20528.5494860207. The cubic root of 421421344 is about 749.7310703955.

Adding to 421421344 its reverse (443124124), we get a palindrome (864545468).

The spelling of 421421344 in words is "four hundred twenty-one million, four hundred twenty-one thousand, three hundred forty-four".