1298161 has 2 divisors, whose sum is σ = 1298162. Its totient is φ = 1298160.

The previous prime is 1298149. The next prime is 1298173. The reversal of 1298161 is 1618921.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1298149) and next prime (1298173).

It can be written as a sum of positive squares in only one way, i.e., 1168561 + 129600 = 1081^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298161 - 2⁹ = 1297649 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298111) 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, 649080 + 649081.

It is an arithmetic number, because the mean of its divisors is an integer number (649081).

2^1298161 is an apocalyptic number.

It is an amenable number.

1298161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298161 is an equidigital number, since it uses as much as digits as its factorization.

1298161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 28.

The square root of 1298161 is about 1139.3686848426. The cubic root of 1298161 is about 109.0878006480.

The spelling of 1298161 in words is "one million, two hundred ninety-eight thousand, one hundred sixty-one".