1191153 has 4 divisors (see below), whose sum is σ = 1588208. Its totient is φ = 794100.

The previous prime is 1191149. The next prime is 1191163. The reversal of 1191153 is 3511911.

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 not a de Polignac number, because 1191153 - 2² = 1191149 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1191103) 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, 198523 + ... + 198528.

It is an arithmetic number, because the mean of its divisors is an integer number (397052).

2^1191153 is an apocalyptic number.

It is an amenable number.

1191153 is a deficient number, since it is larger than the sum of its proper divisors (397055).

1191153 is an equidigital number, since it uses as much as digits as its factorization.

1191153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397054.

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

The square root of 1191153 is about 1091.3995601978. The cubic root of 1191153 is about 106.0040641612.

The spelling of 1191153 in words is "one million, one hundred ninety-one thousand, one hundred fifty-three".