11663271 has 16 divisors (see below), whose sum is σ = 17495520. Its totient is φ = 7774056.

The previous prime is 11663269. The next prime is 11663287. The reversal of 11663271 is 17236611.

It is not a de Polignac number, because 11663271 - 2¹ = 11663269 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 4853.

It is an arithmetic number, because the mean of its divisors is an integer number (1093470).

Almost surely, 2^11663271 is an apocalyptic number.

11663271 is a deficient number, since it is larger than the sum of its proper divisors (5832249).

11663271 is an frugal number, since it uses more digits than its factorization.

11663271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354 (or 5336 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 11663271 is about 3415.1531444432. The cubic root of 11663271 is about 226.7810641787.

Adding to 11663271 its reverse (17236611), we get a palindrome (28899882).

The spelling of 11663271 in words is "eleven million, six hundred sixty-three thousand, two hundred seventy-one".