421423432 has 16 divisors (see below), whose sum is σ = 806981760. Its totient is φ = 206228304.

The previous prime is 421423423. The next prime is 421423469. The reversal of 421423432 is 234324124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421423397 and 421423406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560028 + ... + 560779.

It is an arithmetic number, because the mean of its divisors is an integer number (50436360).

Almost surely, 2^421423432 is an apocalyptic number.

It is an amenable number.

421423432 is a deficient number, since it is larger than the sum of its proper divisors (385558328).

421423432 is a wasteful number, since it uses less digits than its factorization.

421423432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120860 (or 1120856 counting only the distinct ones).

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

The square root of 421423432 is about 20528.6003419619. The cubic root of 421423432 is about 749.7323086146.

Adding to 421423432 its reverse (234324124), we get a palindrome (655747556).

The spelling of 421423432 in words is "four hundred twenty-one million, four hundred twenty-three thousand, four hundred thirty-two".