1191288 has 48 divisors (see below), whose sum is σ = 3467880. Its totient is φ = 340032.

The previous prime is 1191283. The next prime is 1191293. The reversal of 1191288 is 8821911.

It is an interprime number because it is at equal distance from previous prime (1191283) and next prime (1191293).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191283) 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, 670 + ... + 1682.

2^1191288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1733940).

1191288 is an abundant number, since it is smaller than the sum of its proper divisors (2276592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191288 is a wasteful number, since it uses less digits than its factorization.

1191288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1025 counting only the distinct ones).

The product of its digits is 1152, while the sum is 30.

The square root of 1191288 is about 1091.4614056392. The cubic root of 1191288 is about 106.0080686869.

The spelling of 1191288 in words is "one million, one hundred ninety-one thousand, two hundred eighty-eight".