421731147 has 16 divisors (see below), whose sum is σ = 570873888. Its totient is φ = 276883200.

The previous prime is 421731097. The next prime is 421731157. The reversal of 421731147 is 741137124.

It is not a de Polignac number, because 421731147 - 2¹⁰ = 421730123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421731157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220897 + ... + 222797.

It is an arithmetic number, because the mean of its divisors is an integer number (35679618).

Almost surely, 2^421731147 is an apocalyptic number.

421731147 is a deficient number, since it is larger than the sum of its proper divisors (149142741).

421731147 is a wasteful number, since it uses less digits than its factorization.

421731147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990.

The product of its digits is 4704, while the sum is 30.

The square root of 421731147 is about 20536.0937619597. The cubic root of 421731147 is about 749.9147440867.

The spelling of 421731147 in words is "four hundred twenty-one million, seven hundred thirty-one thousand, one hundred forty-seven".