1159861 has 2 divisors, whose sum is σ = 1159862. Its totient is φ = 1159860.

The previous prime is 1159853. The next prime is 1159877. The reversal of 1159861 is 1689511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 938961 + 220900 = 969^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1159861 - 2³ = 1159853 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 (1159811) 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, 579930 + 579931.

It is an arithmetic number, because the mean of its divisors is an integer number (579931).

2^1159861 is an apocalyptic number.

It is an amenable number.

1159861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159861 is an equidigital number, since it uses as much as digits as its factorization.

1159861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 31.

The square root of 1159861 is about 1076.9684303637. The cubic root of 1159861 is about 105.0675604505.

The spelling of 1159861 in words is "one million, one hundred fifty-nine thousand, eight hundred sixty-one".