12140544 has 120 divisors (see below), whose sum is σ = 36699040. Its totient is φ = 3538944.

The previous prime is 12140543. The next prime is 12140549. The reversal of 12140544 is 44504121.

It is a happy number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 12140544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638967 + ... + 638985.

Almost surely, 2^12140544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12140544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18349520).

12140544 is an abundant number, since it is smaller than the sum of its proper divisors (24558496).

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

12140544 is an equidigital number, since it uses as much as digits as its factorization.

12140544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 12140544 is about 3484.3283427369. The cubic root of 12140544 is about 229.8331745522.

Adding to 12140544 its reverse (44504121), we get a palindrome (56644665).

The spelling of 12140544 in words is "twelve million, one hundred forty thousand, five hundred forty-four".