12509985 has 8 divisors (see below), whose sum is σ = 20016000. Its totient is φ = 6671984.

The previous prime is 12509983. The next prime is 12510023. The reversal of 12509985 is 58990521.

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 12509985 - 2¹ = 12509983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12509983) 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 7 ways as a sum of consecutive naturals, for example, 416985 + ... + 417014.

It is an arithmetic number, because the mean of its divisors is an integer number (2502000).

Almost surely, 2^12509985 is an apocalyptic number.

12509985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12509985 is a deficient number, since it is larger than the sum of its proper divisors (7506015).

12509985 is an equidigital number, since it uses as much as digits as its factorization.

12509985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834007.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 12509985 is about 3536.9457162925. The cubic root of 12509985 is about 232.1412202533.

The spelling of 12509985 in words is "twelve million, five hundred nine thousand, nine hundred eighty-five".