12922181 has 4 divisors (see below), whose sum is σ = 12980352. Its totient is φ = 12864012.

The previous prime is 12922171. The next prime is 12922201. The reversal of 12922181 is 18122921.

12922181 is nontrivially palindromic in base 3.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12922181 is a prime.

It is a super-2 number, since 2×12922181² = 333965523593522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 12922181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12922111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28751 + ... + 29196.

It is an arithmetic number, because the mean of its divisors is an integer number (3245088).

Almost surely, 2^12922181 is an apocalyptic number.

It is an amenable number.

12922181 is a deficient number, since it is larger than the sum of its proper divisors (58171).

12922181 is an equidigital number, since it uses as much as digits as its factorization.

12922181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58170.

The product of its digits is 576, while the sum is 26.

The square root of 12922181 is about 3594.7435235354. The cubic root of 12922181 is about 234.6633537953.

The spelling of 12922181 in words is "twelve million, nine hundred twenty-two thousand, one hundred eighty-one".