12521953 has 2 divisors, whose sum is σ = 12521954. Its totient is φ = 12521952.

The previous prime is 12521921. The next prime is 12521981. The reversal of 12521953 is 35912521.

12521953 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12521981) can be obtained adding 12521953 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9381969 + 3139984 = 3063^2 + 1772^2 .

It is an emirp because it is prime and its reverse (35912521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12521953 - 2⁵ = 12521921 is a prime.

It is not a weakly prime, because it can be changed into another prime (12521903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260976 + 6260977.

It is an arithmetic number, because the mean of its divisors is an integer number (6260977).

Almost surely, 2^12521953 is an apocalyptic number.

It is an amenable number.

12521953 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521953 is an equidigital number, since it uses as much as digits as its factorization.

12521953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 12521953 is about 3538.6371670461. The cubic root of 12521953 is about 232.2152246220.

The spelling of 12521953 in words is "twelve million, five hundred twenty-one thousand, nine hundred fifty-three".