11671287 has 4 divisors (see below), whose sum is σ = 15561720. Its totient is φ = 7780856.

The previous prime is 11671273. The next prime is 11671307. The reversal of 11671287 is 78217611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11671287 - 2⁸ = 11671031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11671207) 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, 1945212 + ... + 1945217.

It is an arithmetic number, because the mean of its divisors is an integer number (3890430).

Almost surely, 2^11671287 is an apocalyptic number.

11671287 is a deficient number, since it is larger than the sum of its proper divisors (3890433).

11671287 is an equidigital number, since it uses as much as digits as its factorization.

11671287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890432.

The product of its digits is 4704, while the sum is 33.

The square root of 11671287 is about 3416.3265359154. The cubic root of 11671287 is about 226.8330067456.

Adding to 11671287 its reverse (78217611), we get a palindrome (89888898).

The spelling of 11671287 in words is "eleven million, six hundred seventy-one thousand, two hundred eighty-seven".