1185091 has 4 divisors (see below), whose sum is σ = 1187352. Its totient is φ = 1182832.

The previous prime is 1185089. The next prime is 1185103. The reversal of 1185091 is 1905811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1905811 = 73 ⋅26107.

It is a cyclic number.

It is not a de Polignac number, because 1185091 - 2¹ = 1185089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1185071) 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, 111 + ... + 1543.

It is an arithmetic number, because the mean of its divisors is an integer number (296838).

2^1185091 is an apocalyptic number.

1185091 is a deficient number, since it is larger than the sum of its proper divisors (2261).

1185091 is an equidigital number, since it uses as much as digits as its factorization.

1185091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 1185091 is about 1088.6188497358. The cubic root of 1185091 is about 105.8239334175.

The spelling of 1185091 in words is "one million, one hundred eighty-five thousand, ninety-one".