12540012 has 24 divisors (see below), whose sum is σ = 29813616. Its totient is φ = 4100928.

The previous prime is 12539993. The next prime is 12540041. The reversal of 12540012 is 21004521.

It is a junction number, because it is equal to n+sod(n) for n = 12539973 and 12540000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9223 + ... + 10494.

It is an arithmetic number, because the mean of its divisors is an integer number (1242234).

Almost surely, 2^12540012 is an apocalyptic number.

12540012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12540012 is an abundant number, since it is smaller than the sum of its proper divisors (17273604).

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

12540012 is a wasteful number, since it uses less digits than its factorization.

12540012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19777 (or 19775 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12540012 is about 3541.1879362722. The cubic root of 12540012 is about 232.3268036061.

Adding to 12540012 its reverse (21004521), we get a palindrome (33544533).

The spelling of 12540012 in words is "twelve million, five hundred forty thousand, twelve".