1286797 has 2 divisors, whose sum is σ = 1286798. Its totient is φ = 1286796.

The previous prime is 1286783. The next prime is 1286807. The reversal of 1286797 is 7976821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 841 = 1134^2 + 29^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286797 - 2⁷ = 1286669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643398 + 643399.

It is an arithmetic number, because the mean of its divisors is an integer number (643399).

2^1286797 is an apocalyptic number.

It is an amenable number.

1286797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286797 is an equidigital number, since it uses as much as digits as its factorization.

1286797 is an evil number, because the sum of its binary digits is even.

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

The square root of 1286797 is about 1134.3707506807. The cubic root of 1286797 is about 108.7685519061.

The spelling of 1286797 in words is "one million, two hundred eighty-six thousand, seven hundred ninety-seven".