421000743 has 16 divisors (see below), whose sum is σ = 583722720. Its totient is φ = 269574144.

The previous prime is 421000721. The next prime is 421000753. The reversal of 421000743 is 347000124.

It is not a de Polignac number, because 421000743 - 2¹⁴ = 420984359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421000753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4255 + ... + 29327.

It is an arithmetic number, because the mean of its divisors is an integer number (36482670).

Almost surely, 2^421000743 is an apocalyptic number.

421000743 is a deficient number, since it is larger than the sum of its proper divisors (162721977).

421000743 is a wasteful number, since it uses less digits than its factorization.

421000743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25298.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 421000743 is about 20518.3026344773. The cubic root of 421000743 is about 749.4815634918.

Adding to 421000743 its reverse (347000124), we get a palindrome (768000867).

The spelling of 421000743 in words is "four hundred twenty-one million, seven hundred forty-three", and thus it is an aban number.