12566071 has 4 divisors (see below), whose sum is σ = 14361232. Its totient is φ = 10770912.

The previous prime is 12566053. The next prime is 12566089. The reversal of 12566071 is 17066521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17066521 = 17 ⋅1003913.

It is an interprime number because it is at equal distance from previous prime (12566053) and next prime (12566089).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12566071 is a prime.

It is a super-2 number, since 2×12566071² = 315812280754082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566041) 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, 897570 + ... + 897583.

It is an arithmetic number, because the mean of its divisors is an integer number (3590308).

Almost surely, 2^12566071 is an apocalyptic number.

12566071 is a deficient number, since it is larger than the sum of its proper divisors (1795161).

12566071 is an equidigital number, since it uses as much as digits as its factorization.

12566071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795160.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12566071 is about 3544.8654417340. The cubic root of 12566071 is about 232.4876225731.

The spelling of 12566071 in words is "twelve million, five hundred sixty-six thousand, seventy-one".