12512505 has 16 divisors (see below), whose sum is σ = 20399040. Its totient is φ = 6547008.

The previous prime is 12512501. The next prime is 12512509. The reversal of 12512505 is 50521521.

It is an interprime number because it is at equal distance from previous prime (12512501) and next prime (12512509).

It is not a de Polignac number, because 12512505 - 2² = 12512501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12512501) 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 15 ways as a sum of consecutive naturals, for example, 7075 + ... + 8664.

It is an arithmetic number, because the mean of its divisors is an integer number (1274940).

Almost surely, 2^12512505 is an apocalyptic number.

12512505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12512505 is a deficient number, since it is larger than the sum of its proper divisors (7886535).

12512505 is a wasteful number, since it uses less digits than its factorization.

12512505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15800.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 12512505 is about 3537.3019379182. The cubic root of 12512505 is about 232.1568066456.

The spelling of 12512505 in words is "twelve million, five hundred twelve thousand, five hundred five".