12359861 has 4 divisors (see below), whose sum is σ = 13010400. Its totient is φ = 11709324.

The previous prime is 12359857. The next prime is 12359863. The reversal of 12359861 is 16895321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16895321 = 41 ⋅412081.

It is a cyclic number.

It is not a de Polignac number, because 12359861 - 2² = 12359857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12359863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325241 + ... + 325278.

It is an arithmetic number, because the mean of its divisors is an integer number (3252600).

Almost surely, 2^12359861 is an apocalyptic number.

It is an amenable number.

12359861 is a deficient number, since it is larger than the sum of its proper divisors (650539).

12359861 is an equidigital number, since it uses as much as digits as its factorization.

12359861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650538.

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

The square root of 12359861 is about 3515.6593976095. The cubic root of 12359861 is about 231.2088900869.

The spelling of 12359861 in words is "twelve million, three hundred fifty-nine thousand, eight hundred sixty-one".