1161647 has 2 divisors, whose sum is σ = 1161648. Its totient is φ = 1161646.

The previous prime is 1161637. The next prime is 1161659. The reversal of 1161647 is 7461611.

It is a weak prime.

It is an emirp because it is prime and its reverse (7461611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161647 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161617) 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, 580823 + 580824.

It is an arithmetic number, because the mean of its divisors is an integer number (580824).

2^1161647 is an apocalyptic number.

1161647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161647 is an equidigital number, since it uses as much as digits as its factorization.

1161647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 1161647 is about 1077.7972907741. The cubic root of 1161647 is about 105.1214618600.

The spelling of 1161647 in words is "one million, one hundred sixty-one thousand, six hundred forty-seven".