12600561 has 4 divisors (see below), whose sum is σ = 16800752. Its totient is φ = 8400372.

The previous prime is 12600557. The next prime is 12600563. The reversal of 12600561 is 16500621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12600561 - 2² = 12600557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12600563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2100091 + ... + 2100096.

It is an arithmetic number, because the mean of its divisors is an integer number (4200188).

Almost surely, 2^12600561 is an apocalyptic number.

It is an amenable number.

12600561 is a deficient number, since it is larger than the sum of its proper divisors (4200191).

12600561 is an equidigital number, since it uses as much as digits as its factorization.

12600561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200190.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 12600561 is about 3549.7268909030. The cubic root of 12600561 is about 232.7001306080.

The spelling of 12600561 in words is "twelve million, six hundred thousand, five hundred sixty-one".