1188387 has 12 divisors (see below), whose sum is σ = 1791504. Its totient is φ = 757680.

The previous prime is 1188377. The next prime is 1188389. The reversal of 1188387 is 7838811.

It is not a de Polignac number, because 1188387 - 2⁷ = 1188259 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1188389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2664 + ... + 3077.

It is an arithmetic number, because the mean of its divisors is an integer number (149292).

2^1188387 is an apocalyptic number.

1188387 is a deficient number, since it is larger than the sum of its proper divisors (603117).

1188387 is a wasteful number, since it uses less digits than its factorization.

1188387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5770 (or 5767 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 1188387 is about 1090.1316434266. The cubic root of 1188387 is about 105.9219491884.

The spelling of 1188387 in words is "one million, one hundred eighty-eight thousand, three hundred eighty-seven".