1277897 has 2 divisors, whose sum is σ = 1277898. Its totient is φ = 1277896.

The previous prime is 1277879. The next prime is 1277909. The reversal of 1277897 is 7987721.

Together with previous prime (1277879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 87616 = 1091^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277897 - 2⁶ = 1277833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638948 + 638949.

It is an arithmetic number, because the mean of its divisors is an integer number (638949).

2^1277897 is an apocalyptic number.

It is an amenable number.

1277897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277897 is an equidigital number, since it uses as much as digits as its factorization.

1277897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 41.

The square root of 1277897 is about 1130.4410643638. The cubic root of 1277897 is about 108.5172093580.

The spelling of 1277897 in words is "one million, two hundred seventy-seven thousand, eight hundred ninety-seven".