12027721 has 16 divisors (see below), whose sum is σ = 13616640. Its totient is φ = 10563840.

The previous prime is 12027707. The next prime is 12027731. The reversal of 12027721 is 12772021.

It is a cyclic number.

It is not a de Polignac number, because 12027721 - 2⁷ = 12027593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12027692 and 12027701.

It is not an unprimeable number, because it can be changed into a prime (12027731) 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 15 ways as a sum of consecutive naturals, for example, 14890 + ... + 15676.

It is an arithmetic number, because the mean of its divisors is an integer number (851040).

Almost surely, 2^12027721 is an apocalyptic number.

It is an amenable number.

12027721 is a deficient number, since it is larger than the sum of its proper divisors (1588919).

12027721 is a wasteful number, since it uses less digits than its factorization.

12027721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 12027721 is about 3468.1004887402. The cubic root of 12027721 is about 229.1190052875.

Adding to 12027721 its reverse (12772021), we get a palindrome (24799742).

The spelling of 12027721 in words is "twelve million, twenty-seven thousand, seven hundred twenty-one".