12600649 has 2 divisors, whose sum is σ = 12600650. Its totient is φ = 12600648.

The previous prime is 12600647. The next prime is 12600661. The reversal of 12600649 is 94600621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 2866249 = 3120^2 + 1693^2 .

It is a cyclic number.

It is not a de Polignac number, because 12600649 - 2¹ = 12600647 is a prime.

Together with 12600647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12600647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6300324 + 6300325.

It is an arithmetic number, because the mean of its divisors is an integer number (6300325).

Almost surely, 2^12600649 is an apocalyptic number.

It is an amenable number.

12600649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12600649 is an equidigital number, since it uses as much as digits as its factorization.

12600649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12600649 is about 3549.7392862012. The cubic root of 12600649 is about 232.7006723184.

Subtracting from 12600649 its sum of digits (28), we obtain a palindrome (12600621).

The spelling of 12600649 in words is "twelve million, six hundred thousand, six hundred forty-nine".