421104043 has 2 divisors, whose sum is σ = 421104044. Its totient is φ = 421104042.

The previous prime is 421104037. The next prime is 421104091. The reversal of 421104043 is 340401124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421104043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421104043.

It is not a weakly prime, because it can be changed into another prime (421504043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210552021 + 210552022.

It is an arithmetic number, because the mean of its divisors is an integer number (210552022).

Almost surely, 2^421104043 is an apocalyptic number.

421104043 is a deficient number, since it is larger than the sum of its proper divisors (1).

421104043 is an equidigital number, since it uses as much as digits as its factorization.

421104043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421104043 is about 20520.8197448348. The cubic root of 421104043 is about 749.5428580108.

Adding to 421104043 its reverse (340401124), we get a palindrome (761505167).

The spelling of 421104043 in words is "four hundred twenty-one million, one hundred four thousand, forty-three".