4023665 has 8 divisors (see below), whose sum is σ = 4866048. Its totient is φ = 3193840.

The previous prime is 4023661. The next prime is 4023671. The reversal of 4023665 is 5663204.

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

It is not a de Polignac number, because 4023665 - 2² = 4023661 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4023661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2417 + ... + 3726.

It is an arithmetic number, because the mean of its divisors is an integer number (608256).

Almost surely, 2^4023665 is an apocalyptic number.

It is an amenable number.

4023665 is a deficient number, since it is larger than the sum of its proper divisors (842383).

4023665 is a wasteful number, since it uses less digits than its factorization.

4023665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 4023665 is about 2005.9075252862. The cubic root of 4023665 is about 159.0525385756.

Adding to 4023665 its reverse (5663204), we get a palindrome (9686869).

The spelling of 4023665 in words is "four million, twenty-three thousand, six hundred sixty-five".