12405536 has 48 divisors (see below), whose sum is σ = 28703808. Its totient is φ = 5203200.

The previous prime is 12405521. The next prime is 12405539. The reversal of 12405536 is 63550421.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (12405539) 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, 3221 + ... + 5931.

It is an arithmetic number, because the mean of its divisors is an integer number (597996).

Almost surely, 2^12405536 is an apocalyptic number.

12405536 is a gapful number since it is divisible by the number (16) 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 12405536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14351904).

12405536 is an abundant number, since it is smaller than the sum of its proper divisors (16298272).

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

12405536 is a wasteful number, since it uses less digits than its factorization.

12405536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 12405536 is about 3522.1493437956. The cubic root of 12405536 is about 231.4933453951.

Adding to 12405536 its reverse (63550421), we get a palindrome (75955957).

It can be divided in two parts, 1240 and 5536, that added together give a palindrome (6776).

The spelling of 12405536 in words is "twelve million, four hundred five thousand, five hundred thirty-six".