424439 has 4 divisors (see below), whose sum is σ = 449424. Its totient is φ = 399456.

The previous prime is 424433. The next prime is 424451. The reversal of 424439 is 934424.

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

It is a cyclic number.

It is not a de Polignac number, because 424439 - 2⁴ = 424423 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 (424433) 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, 12467 + ... + 12500.

It is an arithmetic number, because the mean of its divisors is an integer number (112356).

2⁴²⁴⁴³⁹ is an apocalyptic number.

424439 is a deficient number, since it is larger than the sum of its proper divisors (24985).

424439 is a wasteful number, since it uses less digits than its factorization.

424439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24984.

The product of its digits is 3456, while the sum is 26.

The square root of 424439 is about 651.4898310795. The cubic root of 424439 is about 75.1516339627.

The spelling of 424439 in words is "four hundred twenty-four thousand, four hundred thirty-nine".