4221365 has 8 divisors (see below), whose sum is σ = 5130240. Its totient is φ = 3334032.

The previous prime is 4221361. The next prime is 4221379. The reversal of 4221365 is 5631224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4221365 - 2² = 4221361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4221365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4949 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (641280).

Almost surely, 2^4221365 is an apocalyptic number.

It is an amenable number.

4221365 is a deficient number, since it is larger than the sum of its proper divisors (908875).

4221365 is a wasteful number, since it uses less digits than its factorization.

4221365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10771.

The product of its digits is 1440, while the sum is 23.

The square root of 4221365 is about 2054.5960673573. The cubic root of 4221365 is about 161.6159806150.

Adding to 4221365 its reverse (5631224), we get a palindrome (9852589).

The spelling of 4221365 in words is "four million, two hundred twenty-one thousand, three hundred sixty-five".