12621336 has 64 divisors (see below), whose sum is σ = 38841600. Its totient is φ = 3328128.

The previous prime is 12621307. The next prime is 12621337. The reversal of 12621336 is 63312621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (606900).

Almost surely, 2^12621336 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 12621336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19420800).

12621336 is an abundant number, since it is smaller than the sum of its proper divisors (26220264).

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

12621336 is a wasteful number, since it uses less digits than its factorization.

12621336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808 (or 5804 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 12621336 is about 3552.6519671930. The cubic root of 12621336 is about 232.8279474248.

Adding to 12621336 its reverse (63312621), we get a palindrome (75933957).

The spelling of 12621336 in words is "twelve million, six hundred twenty-one thousand, three hundred thirty-six".