12581505 has 48 divisors (see below), whose sum is σ = 23362560. Its totient is φ = 6249600.

The previous prime is 12581501. The next prime is 12581519. The reversal of 12581505 is 50518521.

It is not a de Polignac number, because 12581505 - 2² = 12581501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12581501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40300 + ... + 40610.

It is an arithmetic number, because the mean of its divisors is an integer number (486720).

Almost surely, 2^12581505 is an apocalyptic number.

12581505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12581505 is a deficient number, since it is larger than the sum of its proper divisors (10781055).

12581505 is a wasteful number, since it uses less digits than its factorization.

12581505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 12581505 is about 3547.0417251563. The cubic root of 12581505 is about 232.5827662320.

The spelling of 12581505 in words is "twelve million, five hundred eighty-one thousand, five hundred five".