4222639 has 4 divisors (see below), whose sum is σ = 4406256. Its totient is φ = 4039024.

The previous prime is 4222637. The next prime is 4222649. The reversal of 4222639 is 9362224.

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 4222639 - 2¹ = 4222637 is a prime.

It is a Duffinian number.

4222639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4222637) 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, 91774 + ... + 91819.

It is an arithmetic number, because the mean of its divisors is an integer number (1101564).

Almost surely, 2^4222639 is an apocalyptic number.

4222639 is a deficient number, since it is larger than the sum of its proper divisors (183617).

4222639 is a wasteful number, since it uses less digits than its factorization.

4222639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183616.

The product of its digits is 5184, while the sum is 28.

The square root of 4222639 is about 2054.9060805789. The cubic root of 4222639 is about 161.6322374458.

The spelling of 4222639 in words is "four million, two hundred twenty-two thousand, six hundred thirty-nine".