12621276 has 72 divisors (see below), whose sum is σ = 34673184. Its totient is φ = 3855360.

The previous prime is 12621269. The next prime is 12621289. The reversal of 12621276 is 67212621.

12621276 is a `hidden beast` number, since 12 + 621 + 27 + 6 = 666.

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 23 ways as a sum of consecutive naturals, for example, 24841 + ... + 25343.

It is an arithmetic number, because the mean of its divisors is an integer number (481572).

Almost surely, 2^12621276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12621276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17336592).

12621276 is an abundant number, since it is smaller than the sum of its proper divisors (22051908).

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

12621276 is a wasteful number, since it uses less digits than its factorization.

12621276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 566 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12621276 is about 3552.6435227869. The cubic root of 12621276 is about 232.8275784808.

Adding to 12621276 its reverse (67212621), we get a palindrome (79833897).

The spelling of 12621276 in words is "twelve million, six hundred twenty-one thousand, two hundred seventy-six".