12002540 has 48 divisors (see below), whose sum is σ = 27851040. Its totient is φ = 4308480.

The previous prime is 12002519. The next prime is 12002579. The reversal of 12002540 is 4520021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19274 + ... + 19886.

It is an arithmetic number, because the mean of its divisors is an integer number (580230).

Almost surely, 2^12002540 is an apocalyptic number.

12002540 is a gapful number since it is divisible by the number (10) 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 12002540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13925520).

12002540 is an abundant number, since it is smaller than the sum of its proper divisors (15848500).

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

12002540 is a wasteful number, since it uses less digits than its factorization.

12002540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 12002540 is about 3464.4682131606. The cubic root of 12002540 is about 228.9590005610.

Adding to 12002540 its reverse (4520021), we get a palindrome (16522561).

The spelling of 12002540 in words is "twelve million, two thousand, five hundred forty".