789421 has 4 divisors (see below), whose sum is σ = 791200. Its totient is φ = 787644.

The previous prime is 789419. The next prime is 789443. The reversal of 789421 is 124987.

789421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 789421 - 2¹ = 789419 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 (789491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400 + ... + 1318.

It is an arithmetic number, because the mean of its divisors is an integer number (197800).

2⁷⁸⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

789421 is a deficient number, since it is larger than the sum of its proper divisors (1779).

789421 is an equidigital number, since it uses as much as digits as its factorization.

789421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778.

The product of its digits is 4032, while the sum is 31.

The square root of 789421 is about 888.4936690827. The cubic root of 789421 is about 92.4207648715.

The spelling of 789421 in words is "seven hundred eighty-nine thousand, four hundred twenty-one".