421040343 has 24 divisors (see below), whose sum is σ = 606533760. Its totient is φ = 259672960.

The previous prime is 421040339. The next prime is 421040381. The reversal of 421040343 is 343040124.

It is not a de Polignac number, because 421040343 - 2² = 421040339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421040303) 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 23 ways as a sum of consecutive naturals, for example, 47038 + ... + 55268.

It is an arithmetic number, because the mean of its divisors is an integer number (25272240).

Almost surely, 2^421040343 is an apocalyptic number.

421040343 is a deficient number, since it is larger than the sum of its proper divisors (185493417).

421040343 is a wasteful number, since it uses less digits than its factorization.

421040343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327 (or 8310 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 421040343 is about 20519.2676038888. The cubic root of 421040343 is about 749.5050618980.

Adding to 421040343 its reverse (343040124), we get a palindrome (764080467).

The spelling of 421040343 in words is "four hundred twenty-one million, forty thousand, three hundred forty-three".