12097821 has 8 divisors (see below), whose sum is σ = 16174080. Its totient is φ = 8043392.

The previous prime is 12097817. The next prime is 12097837. The reversal of 12097821 is 12879021.

12097821 is nontrivially palindromic in base 2.

12097821 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 12097821 - 2² = 12097817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12097871) 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, 4116 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (2021760).

Almost surely, 2^12097821 is an apocalyptic number.

It is an amenable number.

12097821 is a deficient number, since it is larger than the sum of its proper divisors (4076259).

12097821 is a wasteful number, since it uses less digits than its factorization.

12097821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10915.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 12097821 is about 3478.1922028548. The cubic root of 12097821 is about 229.5632606923.

The spelling of 12097821 in words is "twelve million, ninety-seven thousand, eight hundred twenty-one".