421384043 has 4 divisors (see below), whose sum is σ = 422229000. Its totient is φ = 420539088.

The previous prime is 421384039. The next prime is 421384063. The reversal of 421384043 is 340483124.

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 421384043 - 2² = 421384039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421383997 and 421384015.

It is not an unprimeable number, because it can be changed into a prime (421384063) 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, 421730 + ... + 422727.

It is an arithmetic number, because the mean of its divisors is an integer number (105557250).

Almost surely, 2^421384043 is an apocalyptic number.

421384043 is a deficient number, since it is larger than the sum of its proper divisors (844957).

421384043 is an equidigital number, since it uses as much as digits as its factorization.

421384043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844956.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 421384043 is about 20527.6409506792. The cubic root of 421384043 is about 749.7089495860.

The spelling of 421384043 in words is "four hundred twenty-one million, three hundred eighty-four thousand, forty-three".