12251809 has 8 divisors (see below), whose sum is σ = 12510440. Its totient is φ = 11995776.

The previous prime is 12251807. The next prime is 12251887. The reversal of 12251809 is 90815221.

12251809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1096209 + 11155600 = 1047^2 + 3340^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12251809 - 2¹ = 12251807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12251803) 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 7 ways as a sum of consecutive naturals, for example, 10927 + ... + 11995.

It is an arithmetic number, because the mean of its divisors is an integer number (1563805).

Almost surely, 2^12251809 is an apocalyptic number.

It is an amenable number.

12251809 is a deficient number, since it is larger than the sum of its proper divisors (258631).

12251809 is a wasteful number, since it uses less digits than its factorization.

12251809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12251809 is about 3500.2584190314. The cubic root of 12251809 is about 230.5331613631.

The spelling of 12251809 in words is "twelve million, two hundred fifty-one thousand, eight hundred nine".