12345424 has 80 divisors (see below), whose sum is σ = 30136960. Its totient is φ = 4769280.

The previous prime is 12345419. The next prime is 12345427. The reversal of 12345424 is 42454321.

12345424 = T₂₇₂ + T₂₇₃ + ... + T₄₅₄.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88747 + ... + 88885.

It is an arithmetic number, because the mean of its divisors is an integer number (376712).

Almost surely, 2^12345424 is an apocalyptic number.

12345424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12345424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15068480).

12345424 is an abundant number, since it is smaller than the sum of its proper divisors (17791536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12345424 is a wasteful number, since it uses less digits than its factorization.

12345424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 222 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 12345424 is about 3513.6055555512. The cubic root of 12345424 is about 231.1188334314.

Adding to 12345424 its reverse (42454321), we get a palindrome (54799745).

It can be divided in two parts, 12345 and 424, that added together give a square (12769 = 113²).

The spelling of 12345424 in words is "twelve million, three hundred forty-five thousand, four hundred twenty-four".