421323424 has 12 divisors (see below), whose sum is σ = 829480554. Its totient is φ = 210661696.

The previous prime is 421323391. The next prime is 421323433. The reversal of 421323424 is 424323124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 408848400 + 12475024 = 20220^2 + 3532^2 .

It is a super-2 number, since 2×421323424² = 355026855222167552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6583147 + ... + 6583210.

Almost surely, 2^421323424 is an apocalyptic number.

It is an amenable number.

421323424 is a deficient number, since it is larger than the sum of its proper divisors (408157130).

421323424 is a wasteful number, since it uses less digits than its factorization.

421323424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13166367 (or 13166359 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 421323424 is about 20526.1643762297. The cubic root of 421323424 is about 749.6729975948.

Adding to 421323424 its reverse (424323124), we get a palindrome (845646548).

The spelling of 421323424 in words is "four hundred twenty-one million, three hundred twenty-three thousand, four hundred twenty-four".