1267897 has 2 divisors, whose sum is σ = 1267898. Its totient is φ = 1267896.

The previous prime is 1267891. The next prime is 1267907. The reversal of 1267897 is 7987621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1212201 + 55696 = 1101^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267897 - 2¹⁹ = 743609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633948 + 633949.

It is an arithmetic number, because the mean of its divisors is an integer number (633949).

2^1267897 is an apocalyptic number.

It is an amenable number.

1267897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267897 is an equidigital number, since it uses as much as digits as its factorization.

1267897 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 1267897 is about 1126.0093250058. The cubic root of 1267897 is about 108.2334058163.

The spelling of 1267897 in words is "one million, two hundred sixty-seven thousand, eight hundred ninety-seven".