12551680 has 40 divisors (see below), whose sum is σ = 30100752. Its totient is φ = 5019648.

The previous prime is 12551663. The next prime is 12551681. The reversal of 12551680 is 8615521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109 + ... + 5011.

Almost surely, 2^12551680 is an apocalyptic number.

12551680 is a gapful number since it is divisible by the number (10) 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 12551680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15050376).

12551680 is an abundant number, since it is smaller than the sum of its proper divisors (17549072).

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

12551680 is an frugal number, since it uses more digits than its factorization.

12551680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926 (or 4910 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 12551680 is about 3542.8350229724. The cubic root of 12551680 is about 232.3988383276.

It can be divided in two parts, 12551 and 680, that added together give a palindrome (13231).

The spelling of 12551680 in words is "twelve million, five hundred fifty-one thousand, six hundred eighty".