1296409 has 2 divisors, whose sum is σ = 1296410. Its totient is φ = 1296408.

The previous prime is 1296391. The next prime is 1296413. The reversal of 1296409 is 9046921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1272384 + 24025 = 1128^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296409 - 2¹¹ = 1294361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1296419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648204 + 648205.

It is an arithmetic number, because the mean of its divisors is an integer number (648205).

2^1296409 is an apocalyptic number.

It is an amenable number.

1296409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296409 is an equidigital number, since it uses as much as digits as its factorization.

1296409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1296409 is about 1138.5995784296. The cubic root of 1296409 is about 109.0387035353.

The spelling of 1296409 in words is "one million, two hundred ninety-six thousand, four hundred nine".