1191135 has 16 divisors (see below), whose sum is σ = 2079360. Its totient is φ = 577440.

The previous prime is 1191131. The next prime is 1191149. The reversal of 1191135 is 5311911.

It is not a de Polignac number, because 1191135 - 2² = 1191131 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 (1191131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3445 + ... + 3774.

It is an arithmetic number, because the mean of its divisors is an integer number (129960).

2^1191135 is an apocalyptic number.

1191135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1191135 is a deficient number, since it is larger than the sum of its proper divisors (888225).

1191135 is a wasteful number, since it uses less digits than its factorization.

1191135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7238.

The product of its digits is 135, while the sum is 21.

The square root of 1191135 is about 1091.3913138742. The cubic root of 1191135 is about 106.0035302016.

It can be divided in two parts, 1191 and 135, that added together give a triangular number (1326 = T₅₁).

The spelling of 1191135 in words is "one million, one hundred ninety-one thousand, one hundred thirty-five".