12660500 has 24 divisors (see below), whose sum is σ = 27651624. Its totient is φ = 5064000.

The previous prime is 12660467. The next prime is 12660523. The reversal of 12660500 is 506621.

It can be written as a sum of positive squares in 4 ways, for example, as 29584 + 12630916 = 172^2 + 3554^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12161 + ... + 13160.

It is an arithmetic number, because the mean of its divisors is an integer number (1152151).

Almost surely, 2^12660500 is an apocalyptic number.

12660500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12660500 is an abundant number, since it is smaller than the sum of its proper divisors (14991124).

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

12660500 is a wasteful number, since it uses less digits than its factorization.

12660500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25340 (or 25328 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12660500 is about 3558.1596366661. The cubic root of 12660500 is about 233.0685204359.

The spelling of 12660500 in words is "twelve million, six hundred sixty thousand, five hundred".