12391134 has 48 divisors (see below), whose sum is σ = 29361024. Its totient is φ = 3414960.

The previous prime is 12391111. The next prime is 12391163. The reversal of 12391134 is 43119321.

It is a congruent number.

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, 40209 + ... + 40515.

It is an arithmetic number, because the mean of its divisors is an integer number (611688).

Almost surely, 2^12391134 is an apocalyptic number.

12391134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12391134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14680512).

12391134 is an abundant number, since it is smaller than the sum of its proper divisors (16969890).

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

12391134 is a wasteful number, since it uses less digits than its factorization.

12391134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 350 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 12391134 is about 3520.1042598196. The cubic root of 12391134 is about 231.4037279274.

The spelling of 12391134 in words is "twelve million, three hundred ninety-one thousand, one hundred thirty-four".