12501660 has 48 divisors (see below), whose sum is σ = 35280000. Its totient is φ = 3307584.

The previous prime is 12501659. The next prime is 12501683. The reversal of 12501660 is 6610521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7591 + ... + 9089.

It is an arithmetic number, because the mean of its divisors is an integer number (735000).

Almost surely, 2^12501660 is an apocalyptic number.

12501660 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 12501660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17640000).

12501660 is an abundant number, since it is smaller than the sum of its proper divisors (22778340).

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

12501660 is a wasteful number, since it uses less digits than its factorization.

12501660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 12501660 is about 3535.7686575906. The cubic root of 12501660 is about 232.0897146092.

The spelling of 12501660 in words is "twelve million, five hundred one thousand, six hundred sixty".