12491136 has 96 divisors (see below), whose sum is σ = 41106000. Its totient is φ = 3566592.

The previous prime is 12491131. The next prime is 12491137. The reversal of 12491136 is 63119421.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7290 + ... + 8838.

Almost surely, 2^12491136 is an apocalyptic number.

12491136 is a gapful number since it is divisible by the number (16) 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 12491136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20553000).

12491136 is an abundant number, since it is smaller than the sum of its proper divisors (28614864).

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

12491136 is a wasteful number, since it uses less digits than its factorization.

12491136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576 (or 1561 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 12491136 is about 3534.2801247213. The cubic root of 12491136 is about 232.0245713175.

The spelling of 12491136 in words is "twelve million, four hundred ninety-one thousand, one hundred thirty-six".