1185081 has 4 divisors (see below), whose sum is σ = 1580112. Its totient is φ = 790052.

The previous prime is 1185077. The next prime is 1185089. The reversal of 1185081 is 1805811.

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 a cyclic number.

It is not a de Polignac number, because 1185081 - 2² = 1185077 is a prime.

It is a super-2 number, since 2×1185081² = 2808833953122, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1185089) 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, 197511 + ... + 197516.

It is an arithmetic number, because the mean of its divisors is an integer number (395028).

2^1185081 is an apocalyptic number.

1185081 is the 689-th centered pentagonal number.

It is an amenable number.

1185081 is a deficient number, since it is larger than the sum of its proper divisors (395031).

1185081 is an equidigital number, since it uses as much as digits as its factorization.

1185081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395030.

The product of its (nonzero) digits is 320, while the sum is 24.

The square root of 1185081 is about 1088.6142567503. The cubic root of 1185081 is about 105.8236357632.

The spelling of 1185081 in words is "one million, one hundred eighty-five thousand, eighty-one".