12191424 has 112 divisors (see below), whose sum is σ = 37843968. Its totient is φ = 3391488.

The previous prime is 12191423. The next prime is 12191429. The reversal of 12191424 is 42419121.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12191394 and 12191403.

It is not an unprimeable number, because it can be changed into a prime (12191423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63072 + ... + 63264.

Almost surely, 2^12191424 is an apocalyptic number.

12191424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12191424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18921984).

12191424 is an abundant number, since it is smaller than the sum of its proper divisors (25652544).

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

12191424 is a wasteful number, since it uses less digits than its factorization.

12191424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 252 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 12191424 is about 3491.6219726654. The cubic root of 12191424 is about 230.1537975760.

The spelling of 12191424 in words is "twelve million, one hundred ninety-one thousand, four hundred twenty-four".