11661227 has 4 divisors (see below), whose sum is σ = 11750376. Its totient is φ = 11572080.

The previous prime is 11661197. The next prime is 11661229. The reversal of 11661227 is 72216611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72216611 = 607 ⋅118973.

It is a cyclic number.

It is not a de Polignac number, because 11661227 - 2⁶ = 11661163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11661196 and 11661205.

It is not an unprimeable number, because it can be changed into a prime (11661229) 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, 44378 + ... + 44639.

It is an arithmetic number, because the mean of its divisors is an integer number (2937594).

Almost surely, 2^11661227 is an apocalyptic number.

11661227 is a deficient number, since it is larger than the sum of its proper divisors (89149).

11661227 is an equidigital number, since it uses as much as digits as its factorization.

11661227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89148.

The product of its digits is 1008, while the sum is 26.

The square root of 11661227 is about 3414.8538768152. The cubic root of 11661227 is about 226.7678155347.

Adding to 11661227 its reverse (72216611), we get a palindrome (83877838).

The spelling of 11661227 in words is "eleven million, six hundred sixty-one thousand, two hundred twenty-seven".