1296985 has 4 divisors (see below), whose sum is σ = 1556388. Its totient is φ = 1037584.

The previous prime is 1296983. The next prime is 1297001. The reversal of 1296985 is 5896921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5896921 = 97 ⋅60793.

It can be written as a sum of positive squares in 2 ways, for example, as 238144 + 1058841 = 488^2 + 1029^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296985 - 2¹ = 1296983 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296983) 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, 129694 + ... + 129703.

It is an arithmetic number, because the mean of its divisors is an integer number (389097).

2^1296985 is an apocalyptic number.

It is an amenable number.

1296985 is a deficient number, since it is larger than the sum of its proper divisors (259403).

1296985 is an equidigital number, since it uses as much as digits as its factorization.

1296985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259402.

The product of its digits is 38880, while the sum is 40.

The square root of 1296985 is about 1138.8524926434. The cubic root of 1296985 is about 109.0548499299.

The spelling of 1296985 in words is "one million, two hundred ninety-six thousand, nine hundred eighty-five".