12007921 has 8 divisors (see below), whose sum is σ = 12293120. Its totient is φ = 11726208.

The previous prime is 12007907. The next prime is 12007927. The reversal of 12007921 is 12970021.

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 12007921 - 2¹⁵ = 11975153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12007892 and 12007901.

It is not an unprimeable number, because it can be changed into a prime (12007927) 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, 6880 + ... + 8446.

It is an arithmetic number, because the mean of its divisors is an integer number (1536640).

Almost surely, 2^12007921 is an apocalyptic number.

It is an amenable number.

12007921 is a deficient number, since it is larger than the sum of its proper divisors (285199).

12007921 is an equidigital number, since it uses as much as digits as its factorization.

12007921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12007921 is about 3465.2447244026. The cubic root of 12007921 is about 228.9932112173.

Adding to 12007921 its reverse (12970021), we get a palindrome (24977942).

The spelling of 12007921 in words is "twelve million, seven thousand, nine hundred twenty-one".