12420344 has 8 divisors (see below), whose sum is σ = 23288160. Its totient is φ = 6210168.

The previous prime is 12420341. The next prime is 12420347. The reversal of 12420344 is 44302421.

It is an interprime number because it is at equal distance from previous prime (12420341) and next prime (12420347).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420341) 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 as a sum of consecutive naturals, namely, 776264 + ... + 776279.

It is an arithmetic number, because the mean of its divisors is an integer number (2911020).

Almost surely, 2^12420344 is an apocalyptic number.

It is an amenable number.

12420344 is a deficient number, since it is larger than the sum of its proper divisors (10867816).

12420344 is a wasteful number, since it uses less digits than its factorization.

12420344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552549 (or 1552545 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 12420344 is about 3524.2508423777. The cubic root of 12420344 is about 231.5854169354.

Adding to 12420344 its reverse (44302421), we get a palindrome (56722765).

The spelling of 12420344 in words is "twelve million, four hundred twenty thousand, three hundred forty-four".