11971131 has 8 divisors (see below), whose sum is σ = 15980544. Its totient is φ = 7971240.

The previous prime is 11971117. The next prime is 11971199. The reversal of 11971131 is 13117911.

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

It is not a de Polignac number, because 11971131 - 2²¹ = 9873979 is a prime.

It is a super-2 number, since 2×11971131² = 286615954838322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11971231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (1997568).

Almost surely, 2^11971131 is an apocalyptic number.

11971131 is a deficient number, since it is larger than the sum of its proper divisors (4009413).

11971131 is a wasteful number, since it uses less digits than its factorization.

11971131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761.

The product of its digits is 189, while the sum is 24.

The square root of 11971131 is about 3459.9322247697. The cubic root of 11971131 is about 228.7591080013.

The spelling of 11971131 in words is "eleven million, nine hundred seventy-one thousand, one hundred thirty-one".