1188397 has 12 divisors (see below), whose sum is σ = 1404480. Its totient is φ = 1002456.

The previous prime is 1188389. The next prime is 1188409. The reversal of 1188397 is 7938811.

It is not a de Polignac number, because 1188397 - 2³ = 1188389 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3718 + ... + 4024.

It is an arithmetic number, because the mean of its divisors is an integer number (117040).

2^1188397 is an apocalyptic number.

It is an amenable number.

1188397 is a deficient number, since it is larger than the sum of its proper divisors (216083).

1188397 is an equidigital number, since it uses as much as digits as its factorization.

1188397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 393 counting only the distinct ones).

The product of its digits is 12096, while the sum is 37.

The square root of 1188397 is about 1090.1362300190. The cubic root of 1188397 is about 105.9222462904.

It can be divided in two parts, 118 and 8397, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 1188397 in words is "one million, one hundred eighty-eight thousand, three hundred ninety-seven".