12511320 has 64 divisors (see below), whose sum is σ = 39748320. Its totient is φ = 3139584.

The previous prime is 12511277. The next prime is 12511349. The reversal of 12511320 is 2311521.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12511320.

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, 1027 + ... + 5106.

Almost surely, 2^12511320 is an apocalyptic number.

12511320 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 12511320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19874160).

12511320 is an abundant number, since it is smaller than the sum of its proper divisors (27237000).

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

12511320 is a wasteful number, since it uses less digits than its factorization.

12511320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164 (or 6160 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12511320 is about 3537.1344334079. The cubic root of 12511320 is about 232.1494775908.

Adding to 12511320 its reverse (2311521), we get a palindrome (14822841).

The spelling of 12511320 in words is "twelve million, five hundred eleven thousand, three hundred twenty".