12020665 has 8 divisors (see below), whose sum is σ = 14697288. Its totient is φ = 9434880.

The previous prime is 12020647. The next prime is 12020681. The reversal of 12020665 is 56602021.

It can be written as a sum of positive squares in 4 ways, for example, as 76729 + 11943936 = 277^2 + 3456^2 .

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

It is not a de Polignac number, because 12020665 - 2⁵ = 12020633 is a prime.

It is a Duffinian number.

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, 22416 + ... + 22945.

It is an arithmetic number, because the mean of its divisors is an integer number (1837161).

Almost surely, 2^12020665 is an apocalyptic number.

It is an amenable number.

12020665 is a deficient number, since it is larger than the sum of its proper divisors (2676623).

12020665 is an equidigital number, since it uses as much as digits as its factorization.

12020665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45419.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12020665 is about 3467.0830679405. The cubic root of 12020665 is about 229.0741926989.

Adding to 12020665 its reverse (56602021), we get a palindrome (68622686).

The spelling of 12020665 in words is "twelve million, twenty thousand, six hundred sixty-five".