12621135 has 16 divisors (see below), whose sum is σ = 21072384. Its totient is φ = 6438432.

The previous prime is 12621127. The next prime is 12621137. The reversal of 12621135 is 53112621.

It is not a de Polignac number, because 12621135 - 2³ = 12621127 is a prime.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17947 + ... + 18636.

It is an arithmetic number, because the mean of its divisors is an integer number (1317024).

Almost surely, 2^12621135 is an apocalyptic number.

12621135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12621135 is a deficient number, since it is larger than the sum of its proper divisors (8451249).

12621135 is a wasteful number, since it uses less digits than its factorization.

12621135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36614.

The product of its digits is 360, while the sum is 21.

The square root of 12621135 is about 3552.6236783538. The cubic root of 12621135 is about 232.8267114578.

Adding to 12621135 its reverse (53112621), we get a palindrome (65733756).

The spelling of 12621135 in words is "twelve million, six hundred twenty-one thousand, one hundred thirty-five".