12531012 has 72 divisors (see below), whose sum is σ = 32711616. Its totient is φ = 3729024.

The previous prime is 12531007. The next prime is 12531019. The reversal of 12531012 is 21013521.

It is a junction number, because it is equal to n+sod(n) for n = 12530982 and 12531000.

It is not an unprimeable number, because it can be changed into a prime (12531019) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 74953 + ... + 75119.

It is an arithmetic number, because the mean of its divisors is an integer number (454328).

Almost surely, 2^12531012 is an apocalyptic number.

12531012 is a gapful number since it is divisible by the number (12) 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 12531012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16355808).

12531012 is an abundant number, since it is smaller than the sum of its proper divisors (20180604).

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

12531012 is a wasteful number, since it uses less digits than its factorization.

12531012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12531012 is about 3539.9169481783. The cubic root of 12531012 is about 232.2712097822.

Adding to 12531012 its reverse (21013521), we get a palindrome (33544533).

The spelling of 12531012 in words is "twelve million, five hundred thirty-one thousand, twelve".