1296649 has 2 divisors, whose sum is σ = 1296650. Its totient is φ = 1296648.

The previous prime is 1296629. The next prime is 1296679. The reversal of 1296649 is 9466921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 156025 = 1068^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296649 - 2⁷ = 1296521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1296629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648324 + 648325.

It is an arithmetic number, because the mean of its divisors is an integer number (648325).

2^1296649 is an apocalyptic number.

It is an amenable number.

1296649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296649 is an equidigital number, since it uses as much as digits as its factorization.

1296649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 1296649 is about 1138.7049661787. The cubic root of 1296649 is about 109.0454317808.

The spelling of 1296649 in words is "one million, two hundred ninety-six thousand, six hundred forty-nine".