12511871 has 2 divisors, whose sum is σ = 12511872. Its totient is φ = 12511870.

The previous prime is 12511859. The next prime is 12511901. The reversal of 12511871 is 17811521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12511871 - 2¹⁴ = 12495487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12511871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12511271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255935 + 6255936.

It is an arithmetic number, because the mean of its divisors is an integer number (6255936).

Almost surely, 2^12511871 is an apocalyptic number.

12511871 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511871 is an equidigital number, since it uses as much as digits as its factorization.

12511871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 26.

The square root of 12511871 is about 3537.2123204580. The cubic root of 12511871 is about 232.1528855042.

The spelling of 12511871 in words is "twelve million, five hundred eleven thousand, eight hundred seventy-one".