12621057 has 8 divisors (see below), whose sum is σ = 16857984. Its totient is φ = 8399088.

The previous prime is 12621053. The next prime is 12621067. The reversal of 12621057 is 75012621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12621057 - 2² = 12621053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12621053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1593 + ... + 5270.

It is an arithmetic number, because the mean of its divisors is an integer number (2107248).

Almost surely, 2^12621057 is an apocalyptic number.

It is an amenable number.

12621057 is a deficient number, since it is larger than the sum of its proper divisors (4236927).

12621057 is an equidigital number, since it uses as much as digits as its factorization.

12621057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7479.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12621057 is about 3552.6127005346. The cubic root of 12621057 is about 232.8262318252.

Adding to 12621057 its reverse (75012621), we get a palindrome (87633678).

The spelling of 12621057 in words is "twelve million, six hundred twenty-one thousand, fifty-seven".