12521087 has 2 divisors, whose sum is σ = 12521088. Its totient is φ = 12521086.

The previous prime is 12521083. The next prime is 12521099. The reversal of 12521087 is 78012521.

It is a weak prime.

It is an emirp because it is prime and its reverse (78012521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12521087 - 2² = 12521083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12521081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260543 + 6260544.

It is an arithmetic number, because the mean of its divisors is an integer number (6260544).

Almost surely, 2^12521087 is an apocalyptic number.

12521087 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521087 is an equidigital number, since it uses as much as digits as its factorization.

12521087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12521087 is about 3538.5148014386. The cubic root of 12521087 is about 232.2098712766.

It can be divided in two parts, 125 and 21087, that added together give a palindrome (21212).

The spelling of 12521087 in words is "twelve million, five hundred twenty-one thousand, eighty-seven".