421455124443 has 16 divisors (see below), whose sum is σ = 578538870560. Its totient is φ = 272707865856.

The previous prime is 421455124381. The next prime is 421455124457. The reversal of 421455124443 is 344421554124.

It is not a de Polignac number, because 421455124443 - 2⁸ = 421455124187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421455122443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4596280 + ... + 4687077.

It is an arithmetic number, because the mean of its divisors is an integer number (36158679410).

Almost surely, 2^421455124443 is an apocalyptic number.

421455124443 is a deficient number, since it is larger than the sum of its proper divisors (157083746117).

421455124443 is a wasteful number, since it uses less digits than its factorization.

421455124443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9283806.

The product of its digits is 307200, while the sum is 39.

Adding to 421455124443 its reverse (344421554124), we get a palindrome (765876678567).

The spelling of 421455124443 in words is "four hundred twenty-one billion, four hundred fifty-five million, one hundred twenty-four thousand, four hundred forty-three".