12506121 has 6 divisors (see below), whose sum is σ = 18064410. Its totient is φ = 8337408.

The previous prime is 12506083. The next prime is 12506147. The reversal of 12506121 is 12160521.

12506121 is a `hidden beast` number, since 1 + 2 + 50 + 612 + 1 = 666.

12506121 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 can be written as a sum of positive squares in only one way, i.e., 7617600 + 4888521 = 2760^2 + 2211^2 .

It is not a de Polignac number, because 12506121 - 2⁶ = 12506057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12506094 and 12506103.

It is not an unprimeable number, because it can be changed into a prime (12506821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 694776 + ... + 694793.

It is an arithmetic number, because the mean of its divisors is an integer number (3010735).

Almost surely, 2^12506121 is an apocalyptic number.

It is an amenable number.

12506121 is a deficient number, since it is larger than the sum of its proper divisors (5558289).

12506121 is a wasteful number, since it uses less digits than its factorization.

12506121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389575 (or 1389572 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12506121 is about 3536.3994401085. The cubic root of 12506121 is about 232.1173170527.

Adding to 12506121 its reverse (12160521), we get a palindrome (24666642).

The spelling of 12506121 in words is "twelve million, five hundred six thousand, one hundred twenty-one".