12520987 has 2 divisors, whose sum is σ = 12520988. Its totient is φ = 12520986.

The previous prime is 12520979. The next prime is 12520997. The reversal of 12520987 is 78902521.

12520987 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 is an emirp because it is prime and its reverse (78902521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12520987 - 2³ = 12520979 is a prime.

It is not a weakly prime, because it can be changed into another prime (12520927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260493 + 6260494.

It is an arithmetic number, because the mean of its divisors is an integer number (6260494).

Almost surely, 2^12520987 is an apocalyptic number.

12520987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520987 is an equidigital number, since it uses as much as digits as its factorization.

12520987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 12520987 is about 3538.5006711883. The cubic root of 12520987 is about 232.2092530915.

It can be divided in two parts, 125 and 20987, that added together give a palindrome (21112).

The spelling of 12520987 in words is "twelve million, five hundred twenty thousand, nine hundred eighty-seven".