11187801 has 20 divisors (see below), whose sum is σ = 17168932. Its totient is φ = 7255008.

The previous prime is 11187773. The next prime is 11187809. The reversal of 11187801 is 10878111.

It can be written as a sum of positive squares in 2 ways, for example, as 8294400 + 2893401 = 2880^2 + 1701^2 .

It is not a de Polignac number, because 11187801 - 2⁵ = 11187769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11187809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1131 + ... + 4863.

Almost surely, 2^11187801 is an apocalyptic number.

It is an amenable number.

11187801 is a deficient number, since it is larger than the sum of its proper divisors (5981131).

11187801 is an equidigital number, since it uses as much as digits as its factorization.

11187801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 27.

The square root of 11187801 is about 3344.8170353548. The cubic root of 11187801 is about 223.6565274394.

The spelling of 11187801 in words is "eleven million, one hundred eighty-seven thousand, eight hundred one".