12191896 has 8 divisors (see below), whose sum is σ = 22859820. Its totient is φ = 6095944.

The previous prime is 12191849. The next prime is 12191899. The reversal of 12191896 is 69819121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12191899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761986 + ... + 762001.

Almost surely, 2^12191896 is an apocalyptic number.

It is an amenable number.

12191896 is a deficient number, since it is larger than the sum of its proper divisors (10667924).

12191896 is a wasteful number, since it uses less digits than its factorization.

12191896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523993 (or 1523989 counting only the distinct ones).

The product of its digits is 7776, while the sum is 37.

The square root of 12191896 is about 3491.6895623752. The cubic root of 12191896 is about 230.1567677292.

The spelling of 12191896 in words is "twelve million, one hundred ninety-one thousand, eight hundred ninety-six".