421493859 has 24 divisors (see below), whose sum is σ = 631628400. Its totient is φ = 270527040.

The previous prime is 421493857. The next prime is 421493873. The reversal of 421493859 is 958394124.

It is not a de Polignac number, because 421493859 - 2¹ = 421493857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421493857) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 96789 + ... + 101049.

It is an arithmetic number, because the mean of its divisors is an integer number (26317850).

Almost surely, 2^421493859 is an apocalyptic number.

421493859 is a deficient number, since it is larger than the sum of its proper divisors (210134541).

421493859 is a wasteful number, since it uses less digits than its factorization.

421493859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675 (or 4672 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 421493859 is about 20530.3156088746. The cubic root of 421493859 is about 749.7740706147.

The spelling of 421493859 in words is "four hundred twenty-one million, four hundred ninety-three thousand, eight hundred fifty-nine".