12421365 has 32 divisors (see below), whose sum is σ = 21966336. Its totient is φ = 5943360.

The previous prime is 12421361. The next prime is 12421391. The reversal of 12421365 is 56312421.

12421365 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421365 - 2² = 12421361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13242 + ... + 14148.

It is an arithmetic number, because the mean of its divisors is an integer number (686448).

Almost surely, 2^12421365 is an apocalyptic number.

12421365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12421365 is a deficient number, since it is larger than the sum of its proper divisors (9544971).

12421365 is a wasteful number, since it uses less digits than its factorization.

12421365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009.

The product of its digits is 1440, while the sum is 24.

The square root of 12421365 is about 3524.3956928813. The cubic root of 12421365 is about 231.5917624986.

Adding to 12421365 its reverse (56312421), we get a palindrome (68733786).

The spelling of 12421365 in words is "twelve million, four hundred twenty-one thousand, three hundred sixty-five".