12272257 has 2 divisors, whose sum is σ = 12272258. Its totient is φ = 12272256.

The previous prime is 12272237. The next prime is 12272261. The reversal of 12272257 is 75227221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10732176 + 1540081 = 3276^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 12272257 - 2⁷ = 12272129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12272237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6136128 + 6136129.

It is an arithmetic number, because the mean of its divisors is an integer number (6136129).

Almost surely, 2^12272257 is an apocalyptic number.

It is an amenable number.

12272257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12272257 is an equidigital number, since it uses as much as digits as its factorization.

12272257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 28.

The square root of 12272257 is about 3503.1781284999. The cubic root of 12272257 is about 230.6613416730.

Adding to 12272257 its reverse (75227221), we get a palindrome (87499478).

The spelling of 12272257 in words is "twelve million, two hundred seventy-two thousand, two hundred fifty-seven".