1281047 has 2 divisors, whose sum is σ = 1281048. Its totient is φ = 1281046.

The previous prime is 1281043. The next prime is 1281083. The reversal of 1281047 is 7401821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281047 - 2² = 1281043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640523 + 640524.

It is an arithmetic number, because the mean of its divisors is an integer number (640524).

2^1281047 is an apocalyptic number.

1281047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281047 is an equidigital number, since it uses as much as digits as its factorization.

1281047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1281047 is about 1131.8334683159. The cubic root of 1281047 is about 108.6063007128.

Adding to 1281047 its reverse (7401821), we get a palindrome (8682868).

The spelling of 1281047 in words is "one million, two hundred eighty-one thousand, forty-seven".