12197281 has 2 divisors, whose sum is σ = 12197282. Its totient is φ = 12197280.

The previous prime is 12197257. The next prime is 12197321. The reversal of 12197281 is 18279121.

12197281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6170256 + 6027025 = 2484^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 12197281 - 2¹¹ = 12195233 is a prime.

It is a super-2 number, since 2×12197281² = 297547327585922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12197231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098640 + 6098641.

It is an arithmetic number, because the mean of its divisors is an integer number (6098641).

Almost surely, 2^12197281 is an apocalyptic number.

It is an amenable number.

12197281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197281 is an equidigital number, since it uses as much as digits as its factorization.

12197281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 12197281 is about 3492.4605939080. The cubic root of 12197281 is about 230.1906484798.

The spelling of 12197281 in words is "twelve million, one hundred ninety-seven thousand, two hundred eighty-one".