1273121 has 2 divisors, whose sum is σ = 1273122. Its totient is φ = 1273120.

The previous prime is 1273117. The next prime is 1273127. The reversal of 1273121 is 1213721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079521 + 193600 = 1039^2 + 440^2 .

It is an emirp because it is prime and its reverse (1213721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1273121 - 2² = 1273117 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1273121.

It is not a weakly prime, because it can be changed into another prime (1273127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636560 + 636561.

It is an arithmetic number, because the mean of its divisors is an integer number (636561).

2^1273121 is an apocalyptic number.

It is an amenable number.

1273121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273121 is an equidigital number, since it uses as much as digits as its factorization.

1273121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84, while the sum is 17.

The square root of 1273121 is about 1128.3266371047. The cubic root of 1273121 is about 108.3818501949.

Adding to 1273121 its reverse (1213721), we get a palindrome (2486842).

The spelling of 1273121 in words is "one million, two hundred seventy-three thousand, one hundred twenty-one".