12505071 has 8 divisors (see below), whose sum is σ = 16740864. Its totient is φ = 8303000.

The previous prime is 12505069. The next prime is 12505079. The reversal of 12505071 is 17050521.

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 12505071 - 2¹ = 12505069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7551 + ... + 9056.

It is an arithmetic number, because the mean of its divisors is an integer number (2092608).

Almost surely, 2^12505071 is an apocalyptic number.

12505071 is a deficient number, since it is larger than the sum of its proper divisors (4235793).

12505071 is a wasteful number, since it uses less digits than its factorization.

12505071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16861.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 12505071 is about 3536.2509809118. The cubic root of 12505071 is about 232.1108207670.

Adding to 12505071 its reverse (17050521), we get a palindrome (29555592).

The spelling of 12505071 in words is "twelve million, five hundred five thousand, seventy-one".