12405851 has 2 divisors, whose sum is σ = 12405852. Its totient is φ = 12405850.

The previous prime is 12405829. The next prime is 12405893. The reversal of 12405851 is 15850421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12405851 - 2¹⁰ = 12404827 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12405851.

It is not a weakly prime, because it can be changed into another prime (12405751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202925 + 6202926.

It is an arithmetic number, because the mean of its divisors is an integer number (6202926).

Almost surely, 2^12405851 is an apocalyptic number.

12405851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405851 is an equidigital number, since it uses as much as digits as its factorization.

12405851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 12405851 is about 3522.1940605253. The cubic root of 12405851 is about 231.4953047296.

The spelling of 12405851 in words is "twelve million, four hundred five thousand, eight hundred fifty-one".