12191975 has 12 divisors (see below), whose sum is σ = 16007904. Its totient is φ = 9179520.

The previous prime is 12191947. The next prime is 12192017. The reversal of 12191975 is 57919121.

12191975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12191975 - 2²⁰ = 11143399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13919 + ... + 14768.

It is an arithmetic number, because the mean of its divisors is an integer number (1333992).

Almost surely, 2^12191975 is an apocalyptic number.

12191975 is a deficient number, since it is larger than the sum of its proper divisors (3815929).

12191975 is a wasteful number, since it uses less digits than its factorization.

12191975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28714 (or 28709 counting only the distinct ones).

The product of its digits is 5670, while the sum is 35.

The square root of 12191975 is about 3491.7008749319. The cubic root of 12191975 is about 230.1572648448.

The spelling of 12191975 in words is "twelve million, one hundred ninety-one thousand, nine hundred seventy-five".