12551660 has 48 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 4482240.

The previous prime is 12551653. The next prime is 12551663. The reversal of 12551660 is 6615521.

It is not an unprimeable number, because it can be changed into a prime (12551663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12497 + ... + 13463.

It is an arithmetic number, because the mean of its divisors is an integer number (609840).

Almost surely, 2^12551660 is an apocalyptic number.

12551660 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 12551660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14636160).

12551660 is an abundant number, since it is smaller than the sum of its proper divisors (16720660).

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

12551660 is a wasteful number, since it uses less digits than its factorization.

12551660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12551660 is about 3542.8322003730. The cubic root of 12551660 is about 232.3987148918.

The spelling of 12551660 in words is "twelve million, five hundred fifty-one thousand, six hundred sixty".