422439 has 4 divisors (see below), whose sum is σ = 563256. Its totient is φ = 281624.

The previous prime is 422431. The next prime is 422453. The reversal of 422439 is 934224.

It is a happy number.

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 422439 - 2³ = 422431 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422431) 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, 70404 + ... + 70409.

It is an arithmetic number, because the mean of its divisors is an integer number (140814).

2⁴²²⁴³⁹ is an apocalyptic number.

422439 is a deficient number, since it is larger than the sum of its proper divisors (140817).

422439 is a wasteful number, since it uses less digits than its factorization.

422439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140816.

The product of its digits is 1728, while the sum is 24.

The square root of 422439 is about 649.9530752293. The cubic root of 422439 is about 75.0334073393.

It can be divided in two parts, 422 and 439, that added together give a triangular number (861 = T₄₁).

The spelling of 422439 in words is "four hundred twenty-two thousand, four hundred thirty-nine".