1272847 has 2 divisors, whose sum is σ = 1272848. Its totient is φ = 1272846.

The previous prime is 1272833. The next prime is 1272851. The reversal of 1272847 is 7482721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272827) 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 as a sum of consecutive naturals, namely, 636423 + 636424.

It is an arithmetic number, because the mean of its divisors is an integer number (636424).

2^1272847 is an apocalyptic number.

1272847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272847 is an equidigital number, since it uses as much as digits as its factorization.

1272847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 31.

The square root of 1272847 is about 1128.2052118298. The cubic root of 1272847 is about 108.3740743544.

The spelling of 1272847 in words is "one million, two hundred seventy-two thousand, eight hundred forty-seven".