4120665 has 8 divisors (see below), whose sum is σ = 6593088. Its totient is φ = 2197680.

The previous prime is 4120661. The next prime is 4120673. The reversal of 4120665 is 5660214.

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

It is not a de Polignac number, because 4120665 - 2² = 4120661 is a prime.

4120665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4120661) 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, 137341 + ... + 137370.

It is an arithmetic number, because the mean of its divisors is an integer number (824136).

Almost surely, 2^4120665 is an apocalyptic number.

It is an amenable number.

4120665 is a deficient number, since it is larger than the sum of its proper divisors (2472423).

4120665 is a wasteful number, since it uses less digits than its factorization.

4120665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274719.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 4120665 is about 2029.9421174014. The cubic root of 4120665 is about 160.3205163583.

Adding to 4120665 its reverse (5660214), we get a palindrome (9780879).

It can be divided in two parts, 41 and 20665, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 4120665 in words is "four million, one hundred twenty thousand, six hundred sixty-five".