12379861 has 4 divisors (see below), whose sum is σ = 13332172. Its totient is φ = 11427552.

The previous prime is 12379841. The next prime is 12379883. The reversal of 12379861 is 16897321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2954961 + 9424900 = 1719^2 + 3070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12379861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12379861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12379841) 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, 476136 + ... + 476161.

It is an arithmetic number, because the mean of its divisors is an integer number (3333043).

Almost surely, 2^12379861 is an apocalyptic number.

It is an amenable number.

12379861 is a deficient number, since it is larger than the sum of its proper divisors (952311).

12379861 is an equidigital number, since it uses as much as digits as its factorization.

12379861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952310.

The product of its digits is 18144, while the sum is 37.

The square root of 12379861 is about 3518.5026644867. The cubic root of 12379861 is about 231.3335324231. Note that the first 3 decimals are identical.

The spelling of 12379861 in words is "twelve million, three hundred seventy-nine thousand, eight hundred sixty-one".