1143647 has 2 divisors, whose sum is σ = 1143648. Its totient is φ = 1143646.

The previous prime is 1143643. The next prime is 1143661. The reversal of 1143647 is 7463411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143647 - 2² = 1143643 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143643) 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, 571823 + 571824.

It is an arithmetic number, because the mean of its divisors is an integer number (571824).

2^1143647 is an apocalyptic number.

1143647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143647 is an equidigital number, since it uses as much as digits as its factorization.

1143647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 1143647 is about 1069.4143256942. The cubic root of 1143647 is about 104.5756722412.

The spelling of 1143647 in words is "one million, one hundred forty-three thousand, six hundred forty-seven".