12502661 has 2 divisors, whose sum is σ = 12502662. Its totient is φ = 12502660.

The previous prime is 12502643. The next prime is 12502681. The reversal of 12502661 is 16620521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8300161 + 4202500 = 2881^2 + 2050^2 .

It is an emirp because it is prime and its reverse (16620521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12502661 - 2⁶ = 12502597 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 (12502681) 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, 6251330 + 6251331.

It is an arithmetic number, because the mean of its divisors is an integer number (6251331).

Almost surely, 2^12502661 is an apocalyptic number.

It is an amenable number.

12502661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12502661 is an equidigital number, since it uses as much as digits as its factorization.

12502661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12502661 is about 3535.9102081359. The cubic root of 12502661 is about 232.0959088694.

The spelling of 12502661 in words is "twelve million, five hundred two thousand, six hundred sixty-one".