1297771 has 2 divisors, whose sum is σ = 1297772. Its totient is φ = 1297770.

The previous prime is 1297739. The next prime is 1297781. The reversal of 1297771 is 1777921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1297771 - 2⁵ = 1297739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297781) 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, 648885 + 648886.

It is an arithmetic number, because the mean of its divisors is an integer number (648886).

2^1297771 is an apocalyptic number.

1297771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297771 is an equidigital number, since it uses as much as digits as its factorization.

1297771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6174, while the sum is 34.

The square root of 1297771 is about 1139.1975245760. The cubic root of 1297771 is about 109.0768753202.

The spelling of 1297771 in words is "one million, two hundred ninety-seven thousand, seven hundred seventy-one".