12451616 has 48 divisors (see below), whose sum is σ = 26562816. Its totient is φ = 5723136.

The previous prime is 12451601. The next prime is 12451619. The reversal of 12451616 is 61615421.

It is a super-2 number, since 2×12451616² = 310085482022912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12451619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25325 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (553392).

Almost surely, 2^12451616 is an apocalyptic number.

12451616 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 12451616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13281408).

12451616 is an abundant number, since it is smaller than the sum of its proper divisors (14111200).

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

12451616 is a wasteful number, since it uses less digits than its factorization.

12451616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 553 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 12451616 is about 3528.6847408064. The cubic root of 12451616 is about 231.7796163217.

The spelling of 12451616 in words is "twelve million, four hundred fifty-one thousand, six hundred sixteen".