12051709 has 4 divisors (see below), whose sum is σ = 12249340. Its totient is φ = 11854080.

The previous prime is 12051679. The next prime is 12051727. The reversal of 12051709 is 90715021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90715021 = 31 ⋅2926291.

It can be written as a sum of positive squares in 2 ways, for example, as 5405625 + 6646084 = 2325^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 12051709 - 2⁹ = 12051197 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 (12051769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98724 + ... + 98845.

It is an arithmetic number, because the mean of its divisors is an integer number (3062335).

Almost surely, 2^12051709 is an apocalyptic number.

It is an amenable number.

12051709 is a deficient number, since it is larger than the sum of its proper divisors (197631).

12051709 is an equidigital number, since it uses as much as digits as its factorization.

12051709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197630.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 12051709 is about 3471.5571434156. The cubic root of 12051709 is about 229.2712219028.

The spelling of 12051709 in words is "twelve million, fifty-one thousand, seven hundred nine".