1281697 has 2 divisors, whose sum is σ = 1281698. Its totient is φ = 1281696.

The previous prime is 1281691. The next prime is 1281703. The reversal of 1281697 is 7961821.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1281691) and next prime (1281703).

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 7056 = 1129^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281697 - 2¹⁹ = 757409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1281691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640848 + 640849.

It is an arithmetic number, because the mean of its divisors is an integer number (640849).

2^1281697 is an apocalyptic number.

It is an amenable number.

1281697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281697 is an equidigital number, since it uses as much as digits as its factorization.

1281697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 1281697 is about 1132.1205766172. The cubic root of 1281697 is about 108.6246664608.

The spelling of 1281697 in words is "one million, two hundred eighty-one thousand, six hundred ninety-seven".