12651340 has 72 divisors (see below), whose sum is σ = 30436560. Its totient is φ = 4402944.

The previous prime is 12651323. The next prime is 12651371. The reversal of 12651340 is 4315621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64122 + ... + 64318.

It is an arithmetic number, because the mean of its divisors is an integer number (422730).

Almost surely, 2^12651340 is an apocalyptic number.

12651340 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 12651340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15218280).

12651340 is an abundant number, since it is smaller than the sum of its proper divisors (17785220).

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

12651340 is a wasteful number, since it uses less digits than its factorization.

12651340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12651340 is about 3556.8722214890. The cubic root of 12651340 is about 233.0122977293.

Adding to 12651340 its reverse (4315621), we get a palindrome (16966961).

The spelling of 12651340 in words is "twelve million, six hundred fifty-one thousand, three hundred forty".