12557121 has 8 divisors (see below), whose sum is σ = 16863840. Its totient is φ = 8310912.

The previous prime is 12557113. The next prime is 12557141. The reversal of 12557121 is 12175521.

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

It is not a de Polignac number, because 12557121 - 2³ = 12557113 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12557091 and 12557100.

It is not an unprimeable number, because it can be changed into a prime (12557141) 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, 14640 + ... + 15473.

It is an arithmetic number, because the mean of its divisors is an integer number (2107980).

Almost surely, 2^12557121 is an apocalyptic number.

It is an amenable number.

12557121 is a deficient number, since it is larger than the sum of its proper divisors (4306719).

12557121 is a wasteful number, since it uses less digits than its factorization.

12557121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255.

The product of its digits is 700, while the sum is 24.

The square root of 12557121 is about 3543.6028276318. The cubic root of 12557121 is about 232.4324141626.

The spelling of 12557121 in words is "twelve million, five hundred fifty-seven thousand, one hundred twenty-one".