1188587 has 2 divisors, whose sum is σ = 1188588. Its totient is φ = 1188586.

The previous prime is 1188581. The next prime is 1188601. The reversal of 1188587 is 7858811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1188587 - 2¹⁶ = 1123051 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1188587.

It is not a weakly prime, because it can be changed into another prime (1188581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594293 + 594294.

It is an arithmetic number, because the mean of its divisors is an integer number (594294).

2^1188587 is an apocalyptic number.

1188587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188587 is an equidigital number, since it uses as much as digits as its factorization.

1188587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 38.

The square root of 1188587 is about 1090.2233716079. The cubic root of 1188587 is about 105.9278909121.

The spelling of 1188587 in words is "one million, one hundred eighty-eight thousand, five hundred eighty-seven".