421220432 has 40 divisors (see below), whose sum is σ = 857715936. Its totient is φ = 200140416.

The previous prime is 421220417. The next prime is 421220461. The reversal of 421220432 is 234022124.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 17183 + ... + 33729.

Almost surely, 2^421220432 is an apocalyptic number.

It is an amenable number.

421220432 is an abundant number, since it is smaller than the sum of its proper divisors (436495504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421220432 is a wasteful number, since it uses less digits than its factorization.

421220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16635 (or 16629 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421220432 is about 20523.6554248993. The cubic root of 421220432 is about 749.6119070650.

Adding to 421220432 its reverse (234022124), we get a palindrome (655242556).

The spelling of 421220432 in words is "four hundred twenty-one million, two hundred twenty thousand, four hundred thirty-two".