12892181 has 2 divisors, whose sum is σ = 12892182. Its totient is φ = 12892180.

The previous prime is 12892129. The next prime is 12892189. The reversal of 12892181 is 18129821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 111556 = 3575^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 12892181 - 2¹⁰ = 12891157 is a prime.

It is a super-2 number, since 2×12892181² = 332416661873522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12892189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6446090 + 6446091.

It is an arithmetic number, because the mean of its divisors is an integer number (6446091).

Almost surely, 2^12892181 is an apocalyptic number.

It is an amenable number.

12892181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12892181 is an equidigital number, since it uses as much as digits as its factorization.

12892181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 32.

The square root of 12892181 is about 3590.5683394137. The cubic root of 12892181 is about 234.4816157545.

The spelling of 12892181 in words is "twelve million, eight hundred ninety-two thousand, one hundred eighty-one".