12091716 has 72 divisors (see below), whose sum is σ = 37628864. Its totient is φ = 3188160.

The previous prime is 12091699. The next prime is 12091747. The reversal of 12091716 is 61719021.

It is a self number, because there is not a number n which added to its sum of digits gives 12091716.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1431 + ... + 5121.

Almost surely, 2^12091716 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 12091716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18814432).

12091716 is an abundant number, since it is smaller than the sum of its proper divisors (25537148).

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

12091716 is a wasteful number, since it uses less digits than its factorization.

12091716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721 (or 3716 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 12091716 is about 3477.3144810327. The cubic root of 12091716 is about 229.5246388743.

The spelling of 12091716 in words is "twelve million, ninety-one thousand, seven hundred sixteen".