12481515 has 24 divisors (see below), whose sum is σ = 21994128. Its totient is φ = 6546240.

The previous prime is 12481493. The next prime is 12481517. The reversal of 12481515 is 51518421.

It is a de Polignac number, because none of the positive numbers 2^k-12481515 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12481517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 472 + ... + 5018.

It is an arithmetic number, because the mean of its divisors is an integer number (916422).

Almost surely, 2^12481515 is an apocalyptic number.

12481515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12481515 is a deficient number, since it is larger than the sum of its proper divisors (9512613).

12481515 is a wasteful number, since it uses less digits than its factorization.

12481515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619 (or 4616 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 12481515 is about 3532.9187649874. The cubic root of 12481515 is about 231.9649855501.

Adding to 12481515 its reverse (51518421), we get a palindrome (63999936).

It can be divided in two parts, 12481 and 515, that added together give a square (12996 = 114²).

The spelling of 12481515 in words is "twelve million, four hundred eighty-one thousand, five hundred fifteen".