12646071 has 16 divisors (see below), whose sum is σ = 18911200. Its totient is φ = 8351424.

The previous prime is 12646057. The next prime is 12646087. The reversal of 12646071 is 17064621.

12646071 is a `hidden beast` number, since 12 + 646 + 0 + 7 + 1 = 666.

It is not a de Polignac number, because 12646071 - 2¹⁰ = 12645047 is a prime.

It is a super-2 number, since 2×12646071² = 319846223474082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 5091.

It is an arithmetic number, because the mean of its divisors is an integer number (1181950).

Almost surely, 2^12646071 is an apocalyptic number.

12646071 is a deficient number, since it is larger than the sum of its proper divisors (6265129).

12646071 is a wasteful number, since it uses less digits than its factorization.

12646071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415 (or 4409 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12646071 is about 3556.1314655114. The cubic root of 12646071 is about 232.9799451017.

The spelling of 12646071 in words is "twelve million, six hundred forty-six thousand, seventy-one".