12280661 has 2 divisors, whose sum is σ = 12280662. Its totient is φ = 12280660.

The previous prime is 12280621. The next prime is 12280687. The reversal of 12280661 is 16608221.

It is an a-pointer prime, because the next prime (12280687) can be obtained adding 12280661 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10278436 + 2002225 = 3206^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 12280661 - 2¹⁴ = 12264277 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₈₀₅₂₃₈ and since 12280661 and 805238 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 12280661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12280621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6140330 + 6140331.

It is an arithmetic number, because the mean of its divisors is an integer number (6140331).

Almost surely, 2^12280661 is an apocalyptic number.

It is an amenable number.

12280661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12280661 is an equidigital number, since it uses as much as digits as its factorization.

12280661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12280661 is about 3504.3774054745. The cubic root of 12280661 is about 230.7139816940.

Adding to 12280661 its reverse (16608221), we get a palindrome (28888882).

The spelling of 12280661 in words is "twelve million, two hundred eighty thousand, six hundred sixty-one".