12839561 has 8 divisors (see below), whose sum is σ = 14745024. Its totient is φ = 10951920.

The previous prime is 12839557. The next prime is 12839579. The reversal of 12839561 is 16593821.

12839561 = T₂₃₈ + T₂₃₉ + ... + T₄₄₈.

12839561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12839561 - 2² = 12839557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12839501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870 + ... + 5823.

It is an arithmetic number, because the mean of its divisors is an integer number (1843128).

Almost surely, 2^12839561 is an apocalyptic number.

It is an amenable number.

12839561 is a deficient number, since it is larger than the sum of its proper divisors (1905463).

12839561 is an equidigital number, since it uses as much as digits as its factorization.

12839561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8911.

The product of its digits is 12960, while the sum is 35.

The square root of 12839561 is about 3583.2333164336. The cubic root of 12839561 is about 234.1621650892.

The spelling of 12839561 in words is "twelve million, eight hundred thirty-nine thousand, five hundred sixty-one".