12145504 has 48 divisors (see below), whose sum is σ = 27820800. Its totient is φ = 5111424.

The previous prime is 12145501. The next prime is 12145513. The reversal of 12145504 is 40554121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145501) 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, 12757 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (579600).

Almost surely, 2^12145504 is an apocalyptic number.

12145504 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 12145504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13910400).

12145504 is an abundant number, since it is smaller than the sum of its proper divisors (15675296).

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

12145504 is an equidigital number, since it uses as much as digits as its factorization.

12145504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 12145504 is about 3485.0400284645. The cubic root of 12145504 is about 229.8644696171.

Adding to 12145504 its reverse (40554121), we get a palindrome (52699625).

The spelling of 12145504 in words is "twelve million, one hundred forty-five thousand, five hundred four".