1271393 has 2 divisors, whose sum is σ = 1271394. Its totient is φ = 1271392.

The previous prime is 1271383. The next prime is 1271399. The reversal of 1271393 is 3931721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067089 + 204304 = 1033^2 + 452^2 .

It is an emirp because it is prime and its reverse (3931721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1271393 - 2¹² = 1267297 is a prime.

It is a Chen prime.

It is equal to p₉₈₀₀₉ and since 1271393 and 98009 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1271399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635696 + 635697.

It is an arithmetic number, because the mean of its divisors is an integer number (635697).

2^1271393 is an apocalyptic number.

It is an amenable number.

1271393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271393 is an equidigital number, since it uses as much as digits as its factorization.

1271393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 26.

The square root of 1271393 is about 1127.5606413848. The cubic root of 1271393 is about 108.3327926337.

The spelling of 1271393 in words is "one million, two hundred seventy-one thousand, three hundred ninety-three".