12621670 has 32 divisors (see below), whose sum is σ = 23872320. Its totient is φ = 4798080.

The previous prime is 12621659. The next prime is 12621671. The reversal of 12621670 is 7612621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621671) 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, 20284 + ... + 20896.

It is an arithmetic number, because the mean of its divisors is an integer number (746010).

Almost surely, 2^12621670 is an apocalyptic number.

12621670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12621670 is a deficient number, since it is larger than the sum of its proper divisors (11250650).

12621670 is a wasteful number, since it uses less digits than its factorization.

12621670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12621670 is about 3552.6989740196. The cubic root of 12621670 is about 232.8300011917.

The spelling of 12621670 in words is "twelve million, six hundred twenty-one thousand, six hundred seventy".