12120291 has 12 divisors (see below), whose sum is σ = 17537520. Its totient is φ = 8066160.

The previous prime is 12120257. The next prime is 12120293. The reversal of 12120291 is 19202121.

It is not a de Polignac number, because 12120291 - 2¹⁰ = 12119267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12120293) 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 11 ways as a sum of consecutive naturals, for example, 8530 + ... + 9848.

It is an arithmetic number, because the mean of its divisors is an integer number (1461460).

Almost surely, 2^12120291 is an apocalyptic number.

12120291 is a deficient number, since it is larger than the sum of its proper divisors (5417229).

12120291 is a wasteful number, since it uses less digits than its factorization.

12120291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12120291 is about 3481.4208306380. The cubic root of 12120291 is about 229.7052999394.

The spelling of 12120291 in words is "twelve million, one hundred twenty thousand, two hundred ninety-one".