12499121 has 2 divisors, whose sum is σ = 12499122. Its totient is φ = 12499120.

The previous prime is 12499117. The next prime is 12499127. The reversal of 12499121 is 12199421.

12499121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11826721 + 672400 = 3439^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 12499121 - 2² = 12499117 is a prime.

It is not a weakly prime, because it can be changed into another prime (12499127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6249560 + 6249561.

It is an arithmetic number, because the mean of its divisors is an integer number (6249561).

Almost surely, 2^12499121 is an apocalyptic number.

It is an amenable number.

12499121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12499121 is an equidigital number, since it uses as much as digits as its factorization.

12499121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 12499121 is about 3535.4095943752. The cubic root of 12499121 is about 232.0740016110.

The spelling of 12499121 in words is "twelve million, four hundred ninety-nine thousand, one hundred twenty-one".