1135861 has 2 divisors, whose sum is σ = 1135862. Its totient is φ = 1135860.

The previous prime is 1135859. The next prime is 1135873. The reversal of 1135861 is 1685311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062961 + 72900 = 1031^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135861 - 2¹ = 1135859 is a prime.

It is a super-2 number, since 2×1135861² = 2580360422642, which contains 22 as substring.

Together with 1135859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1135831) 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, 567930 + 567931.

It is an arithmetic number, because the mean of its divisors is an integer number (567931).

2^1135861 is an apocalyptic number.

It is an amenable number.

1135861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135861 is an equidigital number, since it uses as much as digits as its factorization.

1135861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 25.

The square root of 1135861 is about 1065.7677983501. The cubic root of 1135861 is about 104.3378130161.

The spelling of 1135861 in words is "one million, one hundred thirty-five thousand, eight hundred sixty-one".