11661141 has 4 divisors (see below), whose sum is σ = 15548192. Its totient is φ = 7774092.

The previous prime is 11661121. The next prime is 11661151. The reversal of 11661141 is 14116611.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14116611 = 3 ⋅4705537.

It is not a de Polignac number, because 11661141 - 2⁹ = 11660629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661101) 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, 1943521 + ... + 1943526.

It is an arithmetic number, because the mean of its divisors is an integer number (3887048).

Almost surely, 2^11661141 is an apocalyptic number.

It is an amenable number.

11661141 is a deficient number, since it is larger than the sum of its proper divisors (3887051).

11661141 is an equidigital number, since it uses as much as digits as its factorization.

11661141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887050.

The product of its digits is 144, while the sum is 21.

The square root of 11661141 is about 3414.8412847452. The cubic root of 11661141 is about 226.7672580725.

Adding to 11661141 its reverse (14116611), we get a palindrome (25777752).

The spelling of 11661141 in words is "eleven million, six hundred sixty-one thousand, one hundred forty-one".