11187005 has 4 divisors (see below), whose sum is σ = 13424412. Its totient is φ = 8949600.

The previous prime is 11186983. The next prime is 11187019. The reversal of 11187005 is 50078111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50078111 = 1993 ⋅25127.

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 8357881 = 1682^2 + 2891^2 .

It is not a de Polignac number, because 11187005 - 2⁶ = 11186941 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 1118696 + ... + 1118705.

It is an arithmetic number, because the mean of its divisors is an integer number (3356103).

Almost surely, 2^11187005 is an apocalyptic number.

It is an amenable number.

11187005 is a deficient number, since it is larger than the sum of its proper divisors (2237407).

11187005 is an equidigital number, since it uses as much as digits as its factorization.

11187005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237406.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 11187005 is about 3344.6980431722. The cubic root of 11187005 is about 223.6512230065.

The spelling of 11187005 in words is "eleven million, one hundred eighty-seven thousand, five".