1191055 has 8 divisors (see below), whose sum is σ = 1491552. Its totient is φ = 911328.

The previous prime is 1191031. The next prime is 1191061. The reversal of 1191055 is 5501911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1191055 - 2¹¹ = 1189007 is a prime.

It is a super-2 number, since 2×1191055² = 2837224026050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5064 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (186444).

2^1191055 is an apocalyptic number.

1191055 is a deficient number, since it is larger than the sum of its proper divisors (300497).

1191055 is a wasteful number, since it uses less digits than its factorization.

1191055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10385.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1191055 is about 1091.3546627930. The cubic root of 1191055 is about 106.0011569827.

Adding to 1191055 its reverse (5501911), we get a palindrome (6692966).

The spelling of 1191055 in words is "one million, one hundred ninety-one thousand, fifty-five".