11771471 has 4 divisors (see below), whose sum is σ = 11785200. Its totient is φ = 11757744.

The previous prime is 11771453. The next prime is 11771483. The reversal of 11771471 is 17417711.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11771471 is a prime.

It is a super-3 number, since 3×11771471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11771411) 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, 5486 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (2946300).

Almost surely, 2^11771471 is an apocalyptic number.

11771471 is a deficient number, since it is larger than the sum of its proper divisors (13729).

11771471 is an equidigital number, since it uses as much as digits as its factorization.

11771471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13728.

The product of its digits is 1372, while the sum is 29.

The square root of 11771471 is about 3430.9577380084. The cubic root of 11771471 is about 227.4801882679.

The spelling of 11771471 in words is "eleven million, seven hundred seventy-one thousand, four hundred seventy-one".