1185681 has 16 divisors (see below), whose sum is σ = 1824768. Its totient is φ = 670800.

The previous prime is 1185677. The next prime is 1185683. The reversal of 1185681 is 1865811.

It is a happy number.

It is not a de Polignac number, because 1185681 - 2² = 1185677 is a prime.

It is a super-2 number, since 2×1185681² = 2811678867522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1185683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2536 + ... + 2966.

It is an arithmetic number, because the mean of its divisors is an integer number (114048).

2^1185681 is an apocalyptic number.

It is an amenable number.

1185681 is a deficient number, since it is larger than the sum of its proper divisors (639087).

1185681 is a wasteful number, since it uses less digits than its factorization.

1185681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572.

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

The square root of 1185681 is about 1088.8898015869. The cubic root of 1185681 is about 105.8414920585.

The spelling of 1185681 in words is "one million, one hundred eighty-five thousand, six hundred eighty-one".