12292561 has 2 divisors, whose sum is σ = 12292562. Its totient is φ = 12292560.

The previous prime is 12292559. The next prime is 12292573. The reversal of 12292561 is 16529221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10042561 + 2250000 = 3169^2 + 1500^2 .

It is a cyclic number.

It is not a de Polignac number, because 12292561 - 2¹ = 12292559 is a prime.

It is a super-2 number, since 2×12292561² = 302214111877442, which contains 22 as substring.

Together with 12292559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12292531) 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 as a sum of consecutive naturals, namely, 6146280 + 6146281.

It is an arithmetic number, because the mean of its divisors is an integer number (6146281).

Almost surely, 2^12292561 is an apocalyptic number.

It is an amenable number.

12292561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12292561 is an equidigital number, since it uses as much as digits as its factorization.

12292561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 12292561 is about 3506.0748708492. The cubic root of 12292561 is about 230.7884785000.

The spelling of 12292561 in words is "twelve million, two hundred ninety-two thousand, five hundred sixty-one".