12006657 has 32 divisors (see below), whose sum is σ = 19443200. Its totient is φ = 7278336.

The previous prime is 12006653. The next prime is 12006661. The reversal of 12006657 is 75660021.

12006657 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 6 + 657 = 666.

It is an interprime number because it is at equal distance from previous prime (12006653) and next prime (12006661).

It is not a de Polignac number, because 12006657 - 2² = 12006653 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12006657.

It is not an unprimeable number, because it can be changed into a prime (12006653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27513 + ... + 27945.

It is an arithmetic number, because the mean of its divisors is an integer number (607600).

Almost surely, 2^12006657 is an apocalyptic number.

It is an amenable number.

12006657 is a deficient number, since it is larger than the sum of its proper divisors (7436543).

12006657 is a wasteful number, since it uses less digits than its factorization.

12006657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 12006657 is about 3465.0623371016. The cubic root of 12006657 is about 228.9851760330.

Adding to 12006657 its reverse (75660021), we get a palindrome (87666678).

The spelling of 12006657 in words is "twelve million, six thousand, six hundred fifty-seven".