12621136 has 20 divisors (see below), whose sum is σ = 26676864. Its totient is φ = 5736800.

The previous prime is 12621127. The next prime is 12621137. The reversal of 12621136 is 63112621.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35680 + ... + 36031.

Almost surely, 2^12621136 is an apocalyptic number.

12621136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12621136 is an abundant number, since it is smaller than the sum of its proper divisors (14055728).

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

12621136 is a wasteful number, since it uses less digits than its factorization.

12621136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71730 (or 71724 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 12621136 is about 3552.6238190948. The cubic root of 12621136 is about 232.8267176069.

Adding to 12621136 its reverse (63112621), we get a palindrome (75733757).

The spelling of 12621136 in words is "twelve million, six hundred twenty-one thousand, one hundred thirty-six".