421960043 has 4 divisors (see below), whose sum is σ = 446781240. Its totient is φ = 397138848.

The previous prime is 421960027. The next prime is 421960057. The reversal of 421960043 is 340069124.

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 421960043 - 2⁴ = 421960027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421959988 and 421960015.

It is not an unprimeable number, because it can be changed into a prime (421960243) 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, 12410573 + ... + 12410606.

It is an arithmetic number, because the mean of its divisors is an integer number (111695310).

Almost surely, 2^421960043 is an apocalyptic number.

421960043 is a deficient number, since it is larger than the sum of its proper divisors (24821197).

421960043 is a wasteful number, since it uses less digits than its factorization.

421960043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24821196.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 421960043 is about 20541.6660229885. Note that the first 3 decimals coincide. The cubic root of 421960043 is about 750.0503924659.

The spelling of 421960043 in words is "four hundred twenty-one million, nine hundred sixty thousand, forty-three".