1290847 has 2 divisors, whose sum is σ = 1290848. Its totient is φ = 1290846.

The previous prime is 1290823. The next prime is 1290853. The reversal of 1290847 is 7480921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1290847 - 2⁷ = 1290719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645423 + 645424.

It is an arithmetic number, because the mean of its divisors is an integer number (645424).

2^1290847 is an apocalyptic number.

1290847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290847 is an equidigital number, since it uses as much as digits as its factorization.

1290847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1290847 is about 1136.1544789332. The cubic root of 1290847 is about 108.8825432849.

The spelling of 1290847 in words is "one million, two hundred ninety thousand, eight hundred forty-seven".