12587501 has 2 divisors, whose sum is σ = 12587502. Its totient is φ = 12587500.

The previous prime is 12587467. The next prime is 12587503. The reversal of 12587501 is 10578521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11062276 + 1525225 = 3326^2 + 1235^2 .

It is an emirp because it is prime and its reverse (10578521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12587501 is a prime.

Together with 12587503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12587503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6293750 + 6293751.

It is an arithmetic number, because the mean of its divisors is an integer number (6293751).

Almost surely, 2^12587501 is an apocalyptic number.

It is an amenable number.

12587501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12587501 is an equidigital number, since it uses as much as digits as its factorization.

12587501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 12587501 is about 3547.8868358503. The cubic root of 12587501 is about 232.6197078853.

The spelling of 12587501 in words is "twelve million, five hundred eighty-seven thousand, five hundred one".