421042443 has 8 divisors (see below), whose sum is σ = 564966288. Its totient is φ = 278906784.

The previous prime is 421042421. The next prime is 421042463. The reversal of 421042443 is 344240124.

It is a happy number.

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

It is not a de Polignac number, because 421042443 - 2⁶ = 421042379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421042463) 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, 446496 + ... + 447437.

It is an arithmetic number, because the mean of its divisors is an integer number (70620786).

Almost surely, 2^421042443 is an apocalyptic number.

421042443 is a deficient number, since it is larger than the sum of its proper divisors (143923845).

421042443 is a wasteful number, since it uses less digits than its factorization.

421042443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894093.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 421042443 is about 20519.3187752420. The cubic root of 421042443 is about 749.5063079845.

Adding to 421042443 its reverse (344240124), we get a palindrome (765282567).

The spelling of 421042443 in words is "four hundred twenty-one million, forty-two thousand, four hundred forty-three".