1296663 has 8 divisors (see below), whose sum is σ = 1740528. Its totient is φ = 858624.

The previous prime is 1296649. The next prime is 1296679. The reversal of 1296663 is 3666921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1296663 - 2¹⁰ = 1295639 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296613) 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 7 ways as a sum of consecutive naturals, for example, 906 + ... + 1847.

It is an arithmetic number, because the mean of its divisors is an integer number (217566).

2^1296663 is an apocalyptic number.

1296663 is a deficient number, since it is larger than the sum of its proper divisors (443865).

1296663 is a wasteful number, since it uses less digits than its factorization.

1296663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913.

The product of its digits is 11664, while the sum is 33.

The square root of 1296663 is about 1138.7111134963. The cubic root of 1296663 is about 109.0458242362.

The spelling of 1296663 in words is "one million, two hundred ninety-six thousand, six hundred sixty-three".