12961859 has 4 divisors (see below), whose sum is σ = 12976104. Its totient is φ = 12947616.

The previous prime is 12961849. The next prime is 12961867. The reversal of 12961859 is 95816921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12961859 - 2⁴ = 12961843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12961849) 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, 5657 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (3244026).

Almost surely, 2^12961859 is an apocalyptic number.

12961859 is a deficient number, since it is larger than the sum of its proper divisors (14245).

12961859 is an equidigital number, since it uses as much as digits as its factorization.

12961859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14244.

The product of its digits is 38880, while the sum is 41.

The square root of 12961859 is about 3600.2581851862. The cubic root of 12961859 is about 234.9032890118.

The spelling of 12961859 in words is "twelve million, nine hundred sixty-one thousand, eight hundred fifty-nine".