12251905 has 4 divisors (see below), whose sum is σ = 14702292. Its totient is φ = 9801520.

The previous prime is 12251887. The next prime is 12251909. The reversal of 12251905 is 50915221.

12251905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9585216 + 2666689 = 3096^2 + 1633^2 .

It is not a de Polignac number, because 12251905 - 2¹⁷ = 12120833 is a prime.

It is a super-2 number, since 2×12251905² = 300218352258050, which contains 22 as substring.

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 12251905.

It is not an unprimeable number, because it can be changed into a prime (12251909) 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, 1225186 + ... + 1225195.

It is an arithmetic number, because the mean of its divisors is an integer number (3675573).

Almost surely, 2^12251905 is an apocalyptic number.

It is an amenable number.

12251905 is a deficient number, since it is larger than the sum of its proper divisors (2450387).

12251905 is an equidigital number, since it uses as much as digits as its factorization.

12251905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450386.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 12251905 is about 3500.2721322777. The cubic root of 12251905 is about 230.5337634817.

The spelling of 12251905 in words is "twelve million, two hundred fifty-one thousand, nine hundred five".