12491616 has 24 divisors (see below), whose sum is σ = 32790744. Its totient is φ = 4163840.

The previous prime is 12491603. The next prime is 12491627. The reversal of 12491616 is 61619421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64965 + ... + 65156.

It is an arithmetic number, because the mean of its divisors is an integer number (1366281).

Almost surely, 2^12491616 is an apocalyptic number.

12491616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12491616 is an abundant number, since it is smaller than the sum of its proper divisors (20299128).

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

12491616 is a wasteful number, since it uses less digits than its factorization.

12491616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130134 (or 130126 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 12491616 is about 3534.3480304011. The cubic root of 12491616 is about 232.0275433014.

The spelling of 12491616 in words is "twelve million, four hundred ninety-one thousand, six hundred sixteen".