12745880 has 64 divisors (see below), whose sum is σ = 33480000. Its totient is φ = 4365312.

The previous prime is 12745853. The next prime is 12745891. The reversal of 12745880 is 8854721.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 12745880.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13256 + ... + 14184.

It is an arithmetic number, because the mean of its divisors is an integer number (523125).

Almost surely, 2^12745880 is an apocalyptic number.

12745880 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 12745880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16740000).

12745880 is an abundant number, since it is smaller than the sum of its proper divisors (20734120).

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

12745880 is an equidigital number, since it uses as much as digits as its factorization.

12745880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 12745880 is about 3570.1372522636. The cubic root of 12745880 is about 233.5912703155.

The spelling of 12745880 in words is "twelve million, seven hundred forty-five thousand, eight hundred eighty".