1273289 has 2 divisors, whose sum is σ = 1273290. Its totient is φ = 1273288.

The previous prime is 1273267. The next prime is 1273291. The reversal of 1273289 is 9823721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1247689 + 25600 = 1117^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1273289 - 2⁸ = 1273033 is a prime.

Together with 1273291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1273889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636644 + 636645.

It is an arithmetic number, because the mean of its divisors is an integer number (636645).

2^1273289 is an apocalyptic number.

It is an amenable number.

1273289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273289 is an equidigital number, since it uses as much as digits as its factorization.

1273289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 1273289 is about 1128.4010811764. The cubic root of 1273289 is about 108.3866173119.

It can be divided in two parts, 12732 and 89, that added together give a palindrome (12821).

The spelling of 1273289 in words is "one million, two hundred seventy-three thousand, two hundred eighty-nine".