1161686 has 4 divisors (see below), whose sum is σ = 1742532. Its totient is φ = 580842.

The previous prime is 1161683. The next prime is 1161691. The reversal of 1161686 is 6861611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6861611 = 2153 ⋅3187.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290420 + ... + 290423.

It is an arithmetic number, because the mean of its divisors is an integer number (435633).

2^1161686 is an apocalyptic number.

1161686 is a deficient number, since it is larger than the sum of its proper divisors (580846).

1161686 is an equidigital number, since it uses as much as digits as its factorization.

1161686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580845.

The product of its digits is 1728, while the sum is 29.

The square root of 1161686 is about 1077.8153830782. The cubic root of 1161686 is about 105.1226382618.

The spelling of 1161686 in words is "one million, one hundred sixty-one thousand, six hundred eighty-six".