4401665 has 8 divisors (see below), whose sum is σ = 5293608. Its totient is φ = 3513600.

The previous prime is 4401653. The next prime is 4401667. The reversal of 4401665 is 5661044.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 309136 + 4092529 = 556^2 + 2023^2 .

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

It is not a de Polignac number, because 4401665 - 2⁶ = 4401601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4401667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3065 + ... + 4265.

It is an arithmetic number, because the mean of its divisors is an integer number (661701).

Almost surely, 2^4401665 is an apocalyptic number.

It is an amenable number.

4401665 is a deficient number, since it is larger than the sum of its proper divisors (891943).

4401665 is a wasteful number, since it uses less digits than its factorization.

4401665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

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

The square root of 4401665 is about 2098.0145376045. The cubic root of 4401665 is about 163.8849207547.

The spelling of 4401665 in words is "four million, four hundred one thousand, six hundred sixty-five".