421671503 has 8 divisors (see below), whose sum is σ = 484216320. Its totient is φ = 363161880.

The previous prime is 421671479. The next prime is 421671521. The reversal of 421671503 is 305176124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421671503 - 2²⁰ = 420622927 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 (421671563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008575 + ... + 1008992.

It is an arithmetic number, because the mean of its divisors is an integer number (60527040).

Almost surely, 2^421671503 is an apocalyptic number.

421671503 is a deficient number, since it is larger than the sum of its proper divisors (62544817).

421671503 is a wasteful number, since it uses less digits than its factorization.

421671503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017597.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 421671503 is about 20534.6415357074. The cubic root of 421671503 is about 749.8793897905.

The spelling of 421671503 in words is "four hundred twenty-one million, six hundred seventy-one thousand, five hundred three".