12561683 has 4 divisors (see below), whose sum is σ = 12632040. Its totient is φ = 12491328.

The previous prime is 12561671. The next prime is 12561701. The reversal of 12561683 is 38616521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38616521 = 293 ⋅131797.

It is a cyclic number.

It is not a de Polignac number, because 12561683 - 2¹⁶ = 12496147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12561083) 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, 34910 + ... + 35267.

It is an arithmetic number, because the mean of its divisors is an integer number (3158010).

Almost surely, 2^12561683 is an apocalyptic number.

12561683 is a deficient number, since it is larger than the sum of its proper divisors (70357).

12561683 is an equidigital number, since it uses as much as digits as its factorization.

12561683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70356.

The product of its digits is 8640, while the sum is 32.

The square root of 12561683 is about 3544.2464643419. The cubic root of 12561683 is about 232.4605583073.

The spelling of 12561683 in words is "twelve million, five hundred sixty-one thousand, six hundred eighty-three".