11147971 has 8 divisors (see below), whose sum is σ = 11872224. Its totient is φ = 10431360.

The previous prime is 11147953. The next prime is 11148001. The reversal of 11147971 is 17974111.

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 11147971 - 2¹¹ = 11145923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11147911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266 + ... + 4888.

It is an arithmetic number, because the mean of its divisors is an integer number (1484028).

Almost surely, 2^11147971 is an apocalyptic number.

11147971 is a deficient number, since it is larger than the sum of its proper divisors (724253).

11147971 is a wasteful number, since it uses less digits than its factorization.

11147971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821.

The product of its digits is 1764, while the sum is 31.

The square root of 11147971 is about 3338.8577388083. The cubic root of 11147971 is about 223.3907965796.

The spelling of 11147971 in words is "eleven million, one hundred forty-seven thousand, nine hundred seventy-one".