12681550 has 48 divisors (see below), whose sum is σ = 28391040. Its totient is φ = 4116960.

The previous prime is 12681527. The next prime is 12681577. The reversal of 12681550 is 5518621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5697 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (591480).

Almost surely, 2^12681550 is an apocalyptic number.

12681550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12681550 is an abundant number, since it is smaller than the sum of its proper divisors (15709490).

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

12681550 is a wasteful number, since it uses less digits than its factorization.

12681550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945 (or 1940 counting only the distinct ones).

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

The square root of 12681550 is about 3561.1163979853. The cubic root of 12681550 is about 233.1976194927.

It can be divided in two parts, 12681 and 550, that added together give a palindrome (13231).

The spelling of 12681550 in words is "twelve million, six hundred eighty-one thousand, five hundred fifty".