422399 has 4 divisors (see below), whose sum is σ = 447264. Its totient is φ = 397536.

The previous prime is 422393. The next prime is 422407. The reversal of 422399 is 993224.

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 422399 - 2¹² = 418303 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422393) 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, 12407 + ... + 12440.

It is an arithmetic number, because the mean of its divisors is an integer number (111816).

2⁴²²³⁹⁹ is an apocalyptic number.

422399 is a deficient number, since it is larger than the sum of its proper divisors (24865).

422399 is a wasteful number, since it uses less digits than its factorization.

422399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24864.

The product of its digits is 3888, while the sum is 29.

The square root of 422399 is about 649.9223030486. The cubic root of 422399 is about 75.0310390045.

The spelling of 422399 in words is "four hundred twenty-two thousand, three hundred ninety-nine".