12191256 has 128 divisors (see below), whose sum is σ = 42278400. Its totient is φ = 3162240.

The previous prime is 12191239. The next prime is 12191269. The reversal of 12191256 is 65219121.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16266 + ... + 16998.

It is an arithmetic number, because the mean of its divisors is an integer number (330300).

Almost surely, 2^12191256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12191256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21139200).

12191256 is an abundant number, since it is smaller than the sum of its proper divisors (30087144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12191256 is a wasteful number, since it uses less digits than its factorization.

12191256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 756 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 12191256 is about 3491.5979149954. The cubic root of 12191256 is about 230.1527403843.

The spelling of 12191256 in words is "twelve million, one hundred ninety-one thousand, two hundred fifty-six".