12447265 has 4 divisors (see below), whose sum is σ = 14936724. Its totient is φ = 9957808.

The previous prime is 12447221. The next prime is 12447269. The reversal of 12447265 is 56274421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56274421 = 7 ⋅8039203.

It can be written as a sum of positive squares in 2 ways, for example, as 2486929 + 9960336 = 1577^2 + 3156^2 .

It is a cyclic number.

It is not a de Polignac number, because 12447265 - 2¹³ = 12439073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12447269) 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, 1244722 + ... + 1244731.

It is an arithmetic number, because the mean of its divisors is an integer number (3734181).

Almost surely, 2^12447265 is an apocalyptic number.

It is an amenable number.

12447265 is a deficient number, since it is larger than the sum of its proper divisors (2489459).

12447265 is an equidigital number, since it uses as much as digits as its factorization.

12447265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489458.

The product of its digits is 13440, while the sum is 31.

The square root of 12447265 is about 3528.0681682757. The cubic root of 12447265 is about 231.7526160620.

The spelling of 12447265 in words is "twelve million, four hundred forty-seven thousand, two hundred sixty-five".