12387505 has 8 divisors (see below), whose sum is σ = 16008552. Its totient is φ = 9147648.

The previous prime is 12387481. The next prime is 12387517. The reversal of 12387505 is 50578321.

It can be written as a sum of positive squares in 4 ways, for example, as 53361 + 12334144 = 231^2 + 3512^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12387505 - 2⁷ = 12387377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95224 + ... + 95353.

It is an arithmetic number, because the mean of its divisors is an integer number (2001069).

Almost surely, 2^12387505 is an apocalyptic number.

It is an amenable number.

12387505 is a deficient number, since it is larger than the sum of its proper divisors (3621047).

12387505 is a wasteful number, since it uses less digits than its factorization.

12387505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190595.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 12387505 is about 3519.5887543859. The cubic root of 12387505 is about 231.3811352650.

The spelling of 12387505 in words is "twelve million, three hundred eighty-seven thousand, five hundred five".