12012257 has 2 divisors, whose sum is σ = 12012258. Its totient is φ = 12012256.

The previous prime is 12012197. The next prime is 12012263. The reversal of 12012257 is 75221021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11182336 + 829921 = 3344^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012257 - 2¹⁴ = 11995873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12012157) 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, 6006128 + 6006129.

It is an arithmetic number, because the mean of its divisors is an integer number (6006129).

Almost surely, 2^12012257 is an apocalyptic number.

It is an amenable number.

12012257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012257 is an equidigital number, since it uses as much as digits as its factorization.

12012257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 12012257 is about 3465.8703091720. The cubic root of 12012257 is about 229.0207706667.

Adding to 12012257 its reverse (75221021), we get a palindrome (87233278).

The spelling of 12012257 in words is "twelve million, twelve thousand, two hundred fifty-seven".