11981875 has 20 divisors (see below), whose sum is σ = 15776200. Its totient is φ = 9072000.

The previous prime is 11981867. The next prime is 11981891. The reversal of 11981875 is 57818911.

It is not a de Polignac number, because 11981875 - 2³ = 11981867 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 11371 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (788810).

Almost surely, 2^11981875 is an apocalyptic number.

11981875 is a deficient number, since it is larger than the sum of its proper divisors (3794325).

11981875 is an equidigital number, since it uses as much as digits as its factorization.

11981875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1033 counting only the distinct ones).

The product of its digits is 20160, while the sum is 40.

The square root of 11981875 is about 3461.4845081265. The cubic root of 11981875 is about 228.8275240638.

The spelling of 11981875 in words is "eleven million, nine hundred eighty-one thousand, eight hundred seventy-five".