12120917 has 8 divisors (see below), whose sum is σ = 12801600. Its totient is φ = 11444544.

The previous prime is 12120863. The next prime is 12120919. The reversal of 12120917 is 71902121.

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 12120917 - 2¹⁰ = 12119893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120892 and 12120901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120919) 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, 5933 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (1600200).

Almost surely, 2^12120917 is an apocalyptic number.

It is an amenable number.

12120917 is a deficient number, since it is larger than the sum of its proper divisors (680683).

12120917 is a wasteful number, since it uses less digits than its factorization.

12120917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 12120917 is about 3481.5107352987. The cubic root of 12120917 is about 229.7092545486.

The spelling of 12120917 in words is "twelve million, one hundred twenty thousand, nine hundred seventeen".