424789 has 4 divisors (see below), whose sum is σ = 426220. Its totient is φ = 423360.

The previous prime is 424777. The next prime is 424811. The reversal of 424789 is 987424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44100 + 380689 = 210^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 424789 - 2⁵ = 424757 is a prime.

It is a Duffinian number.

424789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424709) 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, 84 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (106555).

2⁴²⁴⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

424789 is a deficient number, since it is larger than the sum of its proper divisors (1431).

424789 is a wasteful number, since it uses less digits than its factorization.

424789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430.

The product of its digits is 16128, while the sum is 34.

The square root of 424789 is about 651.7583908167. The cubic root of 424789 is about 75.1722854149.

The spelling of 424789 in words is "four hundred twenty-four thousand, seven hundred eighty-nine".