11611885 has 4 divisors (see below), whose sum is σ = 13934268. Its totient is φ = 9289504.

The previous prime is 11611871. The next prime is 11611927. The reversal of 11611885 is 58811611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58811611 = 37 ⋅1589503.

It can be written as a sum of positive squares in 2 ways, for example, as 1249924 + 10361961 = 1118^2 + 3219^2 .

It is a cyclic number.

It is not a de Polignac number, because 11611885 - 2¹¹ = 11609837 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 11.

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, 1161184 + ... + 1161193.

It is an arithmetic number, because the mean of its divisors is an integer number (3483567).

Almost surely, 2^11611885 is an apocalyptic number.

It is an amenable number.

11611885 is a deficient number, since it is larger than the sum of its proper divisors (2322383).

11611885 is an equidigital number, since it uses as much as digits as its factorization.

11611885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322382.

The product of its digits is 1920, while the sum is 31.

The square root of 11611885 is about 3407.6216045799. The cubic root of 11611885 is about 226.4475234448.

The spelling of 11611885 in words is "eleven million, six hundred eleven thousand, eight hundred eighty-five".