421344043 has 4 divisors (see below), whose sum is σ = 422002008. Its totient is φ = 420686080.

The previous prime is 421344013. The next prime is 421344089. The reversal of 421344043 is 340443124.

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 421344043 - 2¹³ = 421335851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421343999 and 421344017.

It is not an unprimeable number, because it can be changed into a prime (421344013) 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, 328021 + ... + 329302.

It is an arithmetic number, because the mean of its divisors is an integer number (105500502).

Almost surely, 2^421344043 is an apocalyptic number.

421344043 is a deficient number, since it is larger than the sum of its proper divisors (657965).

421344043 is an equidigital number, since it uses as much as digits as its factorization.

421344043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657964.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 421344043 is about 20526.6666314821. Note that the first 4 decimals coincide. The cubic root of 421344043 is about 749.6852267237.

Adding to 421344043 its reverse (340443124), we get a palindrome (761787167).

The spelling of 421344043 in words is "four hundred twenty-one million, three hundred forty-four thousand, forty-three".