421143247 has 16 divisors (see below), whose sum is σ = 501811200. Its totient is φ = 345919392.

The previous prime is 421143241. The next prime is 421143253. The reversal of 421143247 is 742341124.

It is an interprime number because it is at equal distance from previous prime (421143241) and next prime (421143253).

It is a de Polignac number, because none of the positive numbers 2^k-421143247 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 (421143241) 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, 2754 + ... + 29152.

It is an arithmetic number, because the mean of its divisors is an integer number (31363200).

Almost surely, 2^421143247 is an apocalyptic number.

421143247 is a deficient number, since it is larger than the sum of its proper divisors (80667953).

421143247 is a wasteful number, since it uses less digits than its factorization.

421143247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26502.

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

The square root of 421143247 is about 20521.7749476014. The cubic root of 421143247 is about 749.5661176358.

The spelling of 421143247 in words is "four hundred twenty-one million, one hundred forty-three thousand, two hundred forty-seven".