1297799 has 2 divisors, whose sum is σ = 1297800. Its totient is φ = 1297798.

The previous prime is 1297781. The next prime is 1297841. The reversal of 1297799 is 9977921.

It is a weak prime.

It is an emirp because it is prime and its reverse (9977921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648899 + 648900.

It is an arithmetic number, because the mean of its divisors is an integer number (648900).

2^1297799 is an apocalyptic number.

1297799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297799 is an equidigital number, since it uses as much as digits as its factorization.

1297799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 44.

The square root of 1297799 is about 1139.2098138622. The cubic root of 1297799 is about 109.0776597756.

It can be divided in two parts, 129 and 7799, that multiplied together give a triangular number (1006071 = T₁₄₁₈).

The spelling of 1297799 in words is "one million, two hundred ninety-seven thousand, seven hundred ninety-nine".