12511280 has 40 divisors (see below), whose sum is σ = 29773392. Its totient is φ = 4886784.

The previous prime is 12511277. The next prime is 12511349. The reversal of 12511280 is 8211521.

It is a happy number.

12511280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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

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, 1622 + ... + 5258.

Almost surely, 2^12511280 is an apocalyptic number.

12511280 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 12511280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14886696).

12511280 is an abundant number, since it is smaller than the sum of its proper divisors (17262112).

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

12511280 is a wasteful number, since it uses less digits than its factorization.

12511280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693 (or 3687 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 12511280 is about 3537.1287791088. The cubic root of 12511280 is about 232.1492301885.

The spelling of 12511280 in words is "twelve million, five hundred eleven thousand, two hundred eighty".