1297105 has 4 divisors (see below), whose sum is σ = 1556532. Its totient is φ = 1037680.

The previous prime is 1297103. The next prime is 1297123. The reversal of 1297105 is 5017921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5017921 = 61 ⋅82261.

It can be written as a sum of positive squares in 2 ways, for example, as 707281 + 589824 = 841^2 + 768^2 .

It is not a de Polignac number, because 1297105 - 2¹ = 1297103 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297105.

It is not an unprimeable number, because it can be changed into a prime (1297103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129706 + ... + 129715.

It is an arithmetic number, because the mean of its divisors is an integer number (389133).

2^1297105 is an apocalyptic number.

It is an amenable number.

1297105 is a deficient number, since it is larger than the sum of its proper divisors (259427).

1297105 is an equidigital number, since it uses as much as digits as its factorization.

1297105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259426.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1297105 is about 1138.9051760353. The cubic root of 1297105 is about 109.0582131603.

The spelling of 1297105 in words is "one million, two hundred ninety-seven thousand, one hundred five".