4121665 has 8 divisors (see below), whose sum is σ = 5051520. Its totient is φ = 3226992.

The previous prime is 4121657. The next prime is 4121687. The reversal of 4121665 is 5661214.

4121665 is nontrivially palindromic in base 9.

4121665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4121665 - 2³ = 4121657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8535 + ... + 9004.

It is an arithmetic number, because the mean of its divisors is an integer number (631440).

Almost surely, 2^4121665 is an apocalyptic number.

It is an amenable number.

4121665 is a deficient number, since it is larger than the sum of its proper divisors (929855).

4121665 is a wasteful number, since it uses less digits than its factorization.

4121665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17591.

The product of its digits is 1440, while the sum is 25.

The square root of 4121665 is about 2030.1884149014. The cubic root of 4121665 is about 160.3334841317. Note that the first 3 decimals are identical.

Adding to 4121665 its reverse (5661214), we get a palindrome (9782879).

The spelling of 4121665 in words is "four million, one hundred twenty-one thousand, six hundred sixty-five".