1298105 has 4 divisors (see below), whose sum is σ = 1557732. Its totient is φ = 1038480.

The previous prime is 1298057. The next prime is 1298111. The reversal of 1298105 is 5018921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5018921 = 1423 ⋅3527.

It can be written as a sum of positive squares in 2 ways, for example, as 436921 + 861184 = 661^2 + 928^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1298105 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 129806 + ... + 129815.

It is an arithmetic number, because the mean of its divisors is an integer number (389433).

2^1298105 is an apocalyptic number.

It is an amenable number.

1298105 is a deficient number, since it is larger than the sum of its proper divisors (259627).

1298105 is an equidigital number, since it uses as much as digits as its factorization.

1298105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259626.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1298105 is about 1139.3441095648. The cubic root of 1298105 is about 109.0862320175.

The spelling of 1298105 in words is "one million, two hundred ninety-eight thousand, one hundred five".