421274143 has 4 divisors (see below), whose sum is σ = 422913600. Its totient is φ = 419634688.

The previous prime is 421274129. The next prime is 421274149. The reversal of 421274143 is 341472124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421274143 - 2¹⁷ = 421143071 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 (421274149) 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 3 ways as a sum of consecutive naturals, for example, 819343 + ... + 819856.

It is an arithmetic number, because the mean of its divisors is an integer number (105728400).

Almost surely, 2^421274143 is an apocalyptic number.

421274143 is a deficient number, since it is larger than the sum of its proper divisors (1639457).

421274143 is a wasteful number, since it uses less digits than its factorization.

421274143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639456.

The product of its digits is 5376, while the sum is 28.

The square root of 421274143 is about 20524.9638976540. The cubic root of 421274143 is about 749.6437674172.

The spelling of 421274143 in words is "four hundred twenty-one million, two hundred seventy-four thousand, one hundred forty-three".