421791271 has 16 divisors (see below), whose sum is σ = 470246688. Its totient is φ = 375091200.

The previous prime is 421791269. The next prime is 421791277. The reversal of 421791271 is 172197124.

It is not a de Polignac number, because 421791271 - 2¹ = 421791269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421791277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127875 + ... + 131131.

It is an arithmetic number, because the mean of its divisors is an integer number (29390418).

Almost surely, 2^421791271 is an apocalyptic number.

421791271 is a deficient number, since it is larger than the sum of its proper divisors (48455417).

421791271 is a wasteful number, since it uses less digits than its factorization.

421791271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522.

The product of its digits is 7056, while the sum is 34.

The square root of 421791271 is about 20537.5575714348. The cubic root of 421791271 is about 749.9503795320.

The spelling of 421791271 in words is "four hundred twenty-one million, seven hundred ninety-one thousand, two hundred seventy-one".