12421265 has 8 divisors (see below), whose sum is σ = 15553728. Its totient is φ = 9504880.

The previous prime is 12421261. The next prime is 12421267. The reversal of 12421265 is 56212421.

It is a happy number.

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

It is not a de Polignac number, because 12421265 - 2² = 12421261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 12421265.

It is not an unprimeable number, because it can be changed into a prime (12421261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53891 + ... + 54120.

It is an arithmetic number, because the mean of its divisors is an integer number (1944216).

Almost surely, 2^12421265 is an apocalyptic number.

It is an amenable number.

12421265 is a deficient number, since it is larger than the sum of its proper divisors (3132463).

12421265 is a wasteful number, since it uses less digits than its factorization.

12421265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108039.

The product of its digits is 960, while the sum is 23.

The square root of 12421265 is about 3524.3815060234. The cubic root of 12421265 is about 231.5911410092.

Adding to 12421265 its reverse (56212421), we get a palindrome (68633686).

The spelling of 12421265 in words is "twelve million, four hundred twenty-one thousand, two hundred sixty-five".