421422443 has 4 divisors (see below), whose sum is σ = 453839568. Its totient is φ = 389005320.

The previous prime is 421422431. The next prime is 421422467. The reversal of 421422443 is 344224124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421422443 - 2¹⁰ = 421421419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421422473) 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, 16208543 + ... + 16208568.

It is an arithmetic number, because the mean of its divisors is an integer number (113459892).

Almost surely, 2^421422443 is an apocalyptic number.

421422443 is a deficient number, since it is larger than the sum of its proper divisors (32417125).

421422443 is a wasteful number, since it uses less digits than its factorization.

421422443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32417124.

The product of its digits is 6144, while the sum is 26.

The square root of 421422443 is about 20528.5762536032. The cubic root of 421422443 is about 749.7317221215.

Adding to 421422443 its reverse (344224124), we get a palindrome (765646567).

The spelling of 421422443 in words is "four hundred twenty-one million, four hundred twenty-two thousand, four hundred forty-three".