12504871 has 4 divisors (see below), whose sum is σ = 12581752. Its totient is φ = 12427992.

The previous prime is 12504851. The next prime is 12504881. The reversal of 12504871 is 17840521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17840521 = 439 ⋅40639.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12504871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12504841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38196 + ... + 38521.

It is an arithmetic number, because the mean of its divisors is an integer number (3145438).

Almost surely, 2^12504871 is an apocalyptic number.

12504871 is a deficient number, since it is larger than the sum of its proper divisors (76881).

12504871 is an equidigital number, since it uses as much as digits as its factorization.

12504871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76880.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 12504871 is about 3536.2227022630. Note that the first 3 decimals coincide. The cubic root of 12504871 is about 232.1095833381.

The spelling of 12504871 in words is "twelve million, five hundred four thousand, eight hundred seventy-one".