1185816 has 16 divisors (see below), whose sum is σ = 2964600. Its totient is φ = 395264.

The previous prime is 1185797. The next prime is 1185817. The reversal of 1185816 is 6185811.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24681 + ... + 24728.

2^1185816 is an apocalyptic number.

It is an amenable number.

1185816 is an abundant number, since it is smaller than the sum of its proper divisors (1778784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1185816 is a wasteful number, since it uses less digits than its factorization.

1185816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49418 (or 49414 counting only the distinct ones).

The product of its digits is 1920, while the sum is 30.

The square root of 1185816 is about 1088.9517895665. The cubic root of 1185816 is about 105.8455088947.

The spelling of 1185816 in words is "one million, one hundred eighty-five thousand, eight hundred sixteen".