424989 has 6 divisors (see below), whose sum is σ = 613886. Its totient is φ = 283320.

The previous prime is 424967. The next prime is 424997. The reversal of 424989 is 989424.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 308025 + 116964 = 555^2 + 342^2 .

It is not a de Polignac number, because 424989 - 2⁷ = 424861 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23602 + ... + 23619.

2⁴²⁴⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

424989 is a deficient number, since it is larger than the sum of its proper divisors (188897).

424989 is a wasteful number, since it uses less digits than its factorization.

424989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47227 (or 47224 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 424989 is about 651.9118038508. The cubic root of 424989 is about 75.1840811521.

The spelling of 424989 in words is "four hundred twenty-four thousand, nine hundred eighty-nine".