1256747 has 2 divisors, whose sum is σ = 1256748. Its totient is φ = 1256746.

The previous prime is 1256737. The next prime is 1256753. The reversal of 1256747 is 7476521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256747 - 2¹⁴ = 1240363 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1256707) 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, 628373 + 628374.

It is an arithmetic number, because the mean of its divisors is an integer number (628374).

2^1256747 is an apocalyptic number.

1256747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256747 is an equidigital number, since it uses as much as digits as its factorization.

1256747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 32.

The square root of 1256747 is about 1121.0472782180. The cubic root of 1256747 is about 107.9151997800.

The spelling of 1256747 in words is "one million, two hundred fifty-six thousand, seven hundred forty-seven".