12257121 has 8 divisors (see below), whose sum is σ = 16870144. Its totient is φ = 7907760.

The previous prime is 12257117. The next prime is 12257129. The reversal of 12257121 is 12175221.

12257121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12257121 - 2² = 12257117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12257129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65806 + ... + 65991.

It is an arithmetic number, because the mean of its divisors is an integer number (2108768).

Almost surely, 2^12257121 is an apocalyptic number.

It is an amenable number.

12257121 is a deficient number, since it is larger than the sum of its proper divisors (4613023).

12257121 is a wasteful number, since it uses less digits than its factorization.

12257121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131831.

The product of its digits is 280, while the sum is 21.

The square root of 12257121 is about 3501.0171379186. The cubic root of 12257121 is about 230.5664738645.

The spelling of 12257121 in words is "twelve million, two hundred fifty-seven thousand, one hundred twenty-one".