421455124555 has 32 divisors (see below), whose sum is σ = 542340417024. Its totient is φ = 313280472576.

The previous prime is 421455124537. The next prime is 421455124613. The reversal of 421455124555 is 555421554124.

It is a cyclic number.

It is not a de Polignac number, because 421455124555 - 2¹⁹ = 421454600267 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10046554 + ... + 10088416.

It is an arithmetic number, because the mean of its divisors is an integer number (16948138032).

Almost surely, 2^421455124555 is an apocalyptic number.

421455124555 is a deficient number, since it is larger than the sum of its proper divisors (120885292469).

421455124555 is a wasteful number, since it uses less digits than its factorization.

421455124555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43395.

The product of its digits is 800000, while the sum is 43.

Adding to 421455124555 its reverse (555421554124), we get a palindrome (976876678679).

The spelling of 421455124555 in words is "four hundred twenty-one billion, four hundred fifty-five million, one hundred twenty-four thousand, five hundred fifty-five".