4221665 has 8 divisors (see below), whose sum is σ = 5789760. Its totient is φ = 2894832.

The previous prime is 4221653. The next prime is 4221671. The reversal of 4221665 is 5661224.

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 4221665 - 2⁴ = 4221649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60275 + ... + 60344.

It is an arithmetic number, because the mean of its divisors is an integer number (723720).

Almost surely, 2^4221665 is an apocalyptic number.

It is an amenable number.

4221665 is a deficient number, since it is larger than the sum of its proper divisors (1568095).

4221665 is a wasteful number, since it uses less digits than its factorization.

4221665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120631.

The product of its digits is 2880, while the sum is 26.

The square root of 4221665 is about 2054.6690731113. The cubic root of 4221665 is about 161.6198090485.

Adding to 4221665 its reverse (5661224), we get a palindrome (9882889).

The spelling of 4221665 in words is "four million, two hundred twenty-one thousand, six hundred sixty-five".