12533430 has 64 divisors (see below), whose sum is σ = 37029888. Its totient is φ = 2643840.

The previous prime is 12533377. The next prime is 12533441. The reversal of 12533430 is 3433521.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12533397 and 12533406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (578592).

Almost surely, 2^12533430 is an apocalyptic number.

12533430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12533430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18514944).

12533430 is an abundant number, since it is smaller than the sum of its proper divisors (24496458).

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

12533430 is a wasteful number, since it uses less digits than its factorization.

12533430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 12533430 is about 3540.2584651406. The cubic root of 12533430 is about 232.2861486040.

Adding to 12533430 its reverse (3433521), we get a palindrome (15966951).

Subtracting from 12533430 its reverse (3433521), we obtain a palindrome (9099909).

The spelling of 12533430 in words is "twelve million, five hundred thirty-three thousand, four hundred thirty".