11912971 has 8 divisors (see below), whose sum is σ = 14415840. Its totient is φ = 9610368.

The previous prime is 11912947. The next prime is 11912993. The reversal of 11912971 is 17921911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11912971 - 2¹¹ = 11910923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11912911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49936 + ... + 50173.

It is an arithmetic number, because the mean of its divisors is an integer number (1801980).

Almost surely, 2^11912971 is an apocalyptic number.

11912971 is a deficient number, since it is larger than the sum of its proper divisors (2502869).

11912971 is a wasteful number, since it uses less digits than its factorization.

11912971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100133.

The product of its digits is 1134, while the sum is 31.

The square root of 11912971 is about 3451.5172026226. The cubic root of 11912971 is about 228.3880421355.

The spelling of 11912971 in words is "eleven million, nine hundred twelve thousand, nine hundred seventy-one".