1188081 has 16 divisors (see below), whose sum is σ = 1785600. Its totient is φ = 780624.

The previous prime is 1188073. The next prime is 1188149. The reversal of 1188081 is 1808811.

It is not a de Polignac number, because 1188081 - 2³ = 1188073 is a prime.

It is a super-2 number, since 2×1188081² = 2823072925122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188001) 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, 1855 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2^1188081 is an apocalyptic number.

It is an amenable number.

1188081 is a deficient number, since it is larger than the sum of its proper divisors (597519).

1188081 is an equidigital number, since it uses as much as digits as its factorization.

1188081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 1188081 is about 1089.9912843688. The cubic root of 1188081 is about 105.9128570608.

The spelling of 1188081 in words is "one million, one hundred eighty-eight thousand, eighty-one".