421421432 has 16 divisors (see below), whose sum is σ = 836645760. Its totient is φ = 198315904.

The previous prime is 421421431. The next prime is 421421459. The reversal of 421421432 is 234124124.

It is a junction number, because it is equal to n+sod(n) for n = 421421398 and 421421407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421421431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549208 + ... + 1549479.

It is an arithmetic number, because the mean of its divisors is an integer number (52290360).

Almost surely, 2^421421432 is an apocalyptic number.

It is an amenable number.

421421432 is a deficient number, since it is larger than the sum of its proper divisors (415224328).

421421432 is a wasteful number, since it uses less digits than its factorization.

421421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098710 (or 3098706 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 421421432 is about 20528.5516293771. The cubic root of 421421432 is about 749.7311225811.

Adding to 421421432 its reverse (234124124), we get a palindrome (655545556).

The spelling of 421421432 in words is "four hundred twenty-one million, four hundred twenty-one thousand, four hundred thirty-two".