1188855 has 24 divisors (see below), whose sum is σ = 2134080. Its totient is φ = 611520.

The previous prime is 1188851. The next prime is 1188857. The reversal of 1188855 is 5588811.

It is not a de Polignac number, because 1188855 - 2² = 1188851 is a prime.

It is a super-2 number, since 2×1188855² = 2826752422050, which contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 850 + ... + 1760.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2^1188855 is an apocalyptic number.

1188855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1188855 is a deficient number, since it is larger than the sum of its proper divisors (945225).

1188855 is a wasteful number, since it uses less digits than its factorization.

1188855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 948 counting only the distinct ones).

The product of its digits is 12800, while the sum is 36.

The square root of 1188855 is about 1090.3462752722. The cubic root of 1188855 is about 105.9358517769.

The spelling of 1188855 in words is "one million, one hundred eighty-eight thousand, eight hundred fifty-five".