12051807 has 4 divisors (see below), whose sum is σ = 16069080. Its totient is φ = 8034536.

The previous prime is 12051779. The next prime is 12051811. The reversal of 12051807 is 70815021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70815021 = 3 ⋅23605007.

It is a cyclic number.

It is not a de Polignac number, because 12051807 - 2⁷ = 12051679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051877) 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, 2008632 + ... + 2008637.

It is an arithmetic number, because the mean of its divisors is an integer number (4017270).

Almost surely, 2^12051807 is an apocalyptic number.

12051807 is a deficient number, since it is larger than the sum of its proper divisors (4017273).

12051807 is an equidigital number, since it uses as much as digits as its factorization.

12051807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017272.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 12051807 is about 3471.5712580905. The cubic root of 12051807 is about 229.2718433505.

Adding to 12051807 its reverse (70815021), we get a palindrome (82866828).

The spelling of 12051807 in words is "twelve million, fifty-one thousand, eight hundred seven".