421421043 has 8 divisors (see below), whose sum is σ = 569592208. Its totient is φ = 277098624.

The previous prime is 421421029. The next prime is 421421047. The reversal of 421421043 is 340124124.

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

It is a de Polignac number, because none of the positive numbers 2^k-421421043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421421047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961930 + ... + 962367.

It is an arithmetic number, because the mean of its divisors is an integer number (71199026).

Almost surely, 2^421421043 is an apocalyptic number.

421421043 is a deficient number, since it is larger than the sum of its proper divisors (148171165).

421421043 is a wasteful number, since it uses less digits than its factorization.

421421043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924373.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 421421043 is about 20528.5421547659. The cubic root of 421421043 is about 749.7308918971.

Adding to 421421043 its reverse (340124124), we get a palindrome (761545167).

The spelling of 421421043 in words is "four hundred twenty-one million, four hundred twenty-one thousand, forty-three".