1276897 has 2 divisors, whose sum is σ = 1276898. Its totient is φ = 1276896.

The previous prime is 1276889. The next prime is 1276903. The reversal of 1276897 is 7986721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 58081 = 1104^2 + 241^2 .

It is an emirp because it is prime and its reverse (7986721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1276897 - 2³ = 1276889 is a prime.

1276897 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276817) 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, 638448 + 638449.

It is an arithmetic number, because the mean of its divisors is an integer number (638449).

2^1276897 is an apocalyptic number.

It is an amenable number.

1276897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276897 is an equidigital number, since it uses as much as digits as its factorization.

1276897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 1276897 is about 1129.9986725656. The cubic root of 1276897 is about 108.4888957751.

The spelling of 1276897 in words is "one million, two hundred seventy-six thousand, eight hundred ninety-seven".