1188681 has 16 divisors (see below), whose sum is σ = 1767360. Its totient is φ = 705600.

The previous prime is 1188679. The next prime is 1188689. The reversal of 1188681 is 1868811.

It is not a de Polignac number, because 1188681 - 2¹ = 1188679 is a prime.

It is a super-2 number, since 2×1188681² = 2825925039522, which contains 22 as substring.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1188689) 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, 606 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (110460).

2^1188681 is an apocalyptic number.

It is an amenable number.

1188681 is a deficient number, since it is larger than the sum of its proper divisors (578679).

1188681 is a wasteful number, since it uses less digits than its factorization.

1188681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its digits is 3072, while the sum is 33.

The square root of 1188681 is about 1090.2664811871. The cubic root of 1188681 is about 105.9306832919.

The spelling of 1188681 in words is "one million, one hundred eighty-eight thousand, six hundred eighty-one".