1296789 has 16 divisors (see below), whose sum is σ = 1909824. Its totient is φ = 777600.

The previous prime is 1296787. The next prime is 1296803. The reversal of 1296789 is 9876921.

It is not a de Polignac number, because 1296789 - 2¹ = 1296787 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1296789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296781) 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 15 ways as a sum of consecutive naturals, for example, 1194 + ... + 2004.

It is an arithmetic number, because the mean of its divisors is an integer number (119364).

2^1296789 is an apocalyptic number.

It is an amenable number.

1296789 is a deficient number, since it is larger than the sum of its proper divisors (613035).

1296789 is a wasteful number, since it uses less digits than its factorization.

1296789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its digits is 54432, while the sum is 42.

The square root of 1296789 is about 1138.7664378616. The cubic root of 1296789 is about 109.0493562073.

The spelling of 1296789 in words is "one million, two hundred ninety-six thousand, seven hundred eighty-nine".