1188897 has 4 divisors (see below), whose sum is σ = 1585200. Its totient is φ = 792596.

The previous prime is 1188857. The next prime is 1188899. The reversal of 1188897 is 7988811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1188897 - 2⁷ = 1188769 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1188899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198147 + ... + 198152.

It is an arithmetic number, because the mean of its divisors is an integer number (396300).

2^1188897 is an apocalyptic number.

It is an amenable number.

1188897 is a deficient number, since it is larger than the sum of its proper divisors (396303).

1188897 is an equidigital number, since it uses as much as digits as its factorization.

1188897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396302.

The product of its digits is 32256, while the sum is 42.

The square root of 1188897 is about 1090.3655350386. The cubic root of 1188897 is about 105.9370992667.

The spelling of 1188897 in words is "one million, one hundred eighty-eight thousand, eight hundred ninety-seven".