421291871 has 24 divisors (see below), whose sum is σ = 569950752. Its totient is φ = 303019200.

The previous prime is 421291861. The next prime is 421291877. The reversal of 421291871 is 178192124.

It is not a de Polignac number, because 421291871 - 2¹⁰ = 421290847 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421291877) 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, 8120 + ... + 30141.

It is an arithmetic number, because the mean of its divisors is an integer number (23747948).

Almost surely, 2^421291871 is an apocalyptic number.

421291871 is a deficient number, since it is larger than the sum of its proper divisors (148658881).

421291871 is a wasteful number, since it uses less digits than its factorization.

421291871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38303 (or 38292 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 421291871 is about 20525.3957574513. The cubic root of 421291871 is about 749.6542827380.

It can be divided in two parts, 421 and 291871, that added together give a palindrome (292292).

The spelling of 421291871 in words is "four hundred twenty-one million, two hundred ninety-one thousand, eight hundred seventy-one".