1296691 has 4 divisors (see below), whose sum is σ = 1414584. Its totient is φ = 1178800.

The previous prime is 1296689. The next prime is 1296703. The reversal of 1296691 is 1966921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1296691 - 2¹ = 1296689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296601) 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, 58930 + ... + 58951.

It is an arithmetic number, because the mean of its divisors is an integer number (353646).

2^1296691 is an apocalyptic number.

1296691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1296691 is a deficient number, since it is larger than the sum of its proper divisors (117893).

1296691 is a wasteful number, since it uses less digits than its factorization.

1296691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117892.

The product of its digits is 5832, while the sum is 34.

The square root of 1296691 is about 1138.7234080320. The cubic root of 1296691 is about 109.0466091384.

It can be divided in two parts, 1 and 296691, that added together give a palindrome (296692).

The spelling of 1296691 in words is "one million, two hundred ninety-six thousand, six hundred ninety-one".