421406443 has 8 divisors (see below), whose sum is σ = 429362208. Its totient is φ = 413509824.

The previous prime is 421406417. The next prime is 421406459. The reversal of 421406443 is 344604124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421406443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421406413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271 + ... + 29032.

It is an arithmetic number, because the mean of its divisors is an integer number (53670276).

Almost surely, 2^421406443 is an apocalyptic number.

421406443 is a deficient number, since it is larger than the sum of its proper divisors (7955765).

421406443 is a wasteful number, since it uses less digits than its factorization.

421406443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29573.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 421406443 is about 20528.1865492303. The cubic root of 421406443 is about 749.7222337332.

The spelling of 421406443 in words is "four hundred twenty-one million, four hundred six thousand, four hundred forty-three".