11975 has 6 divisors (see below), whose sum is σ = 14880. Its totient is φ = 9560.

The previous prime is 11971. The next prime is 11981. The reversal of 11975 is 57911.

It is not a de Polignac number, because 11975 - 2² = 11971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215 + ... + 264.

It is an arithmetic number, because the mean of its divisors is an integer number (2480).

2¹¹⁹⁷⁵ is an apocalyptic number.

11975 is a deficient number, since it is larger than the sum of its proper divisors (2905).

11975 is an equidigital number, since it uses as much as digits as its factorization.

11975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 484 counting only the distinct ones).

The product of its digits is 315, while the sum is 23.

The square root of 11975 is about 109.4303431412. The cubic root of 11975 is about 22.8783749885.

The spelling of 11975 in words is "eleven thousand, nine hundred seventy-five".