12126657 has 8 divisors (see below), whose sum is σ = 16186176. Its totient is φ = 8075792.

The previous prime is 12126643. The next prime is 12126671. The reversal of 12126657 is 75662121.

It is an interprime number because it is at equal distance from previous prime (12126643) and next prime (12126671).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12126657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12126637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2623 + ... + 5579.

It is an arithmetic number, because the mean of its divisors is an integer number (2023272).

Almost surely, 2^12126657 is an apocalyptic number.

It is an amenable number.

12126657 is a deficient number, since it is larger than the sum of its proper divisors (4059519).

12126657 is a wasteful number, since it uses less digits than its factorization.

12126657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4327.

The product of its digits is 5040, while the sum is 30.

The square root of 12126657 is about 3482.3349925014. The cubic root of 12126657 is about 229.7455093149.

Adding to 12126657 its reverse (75662121), we get a palindrome (87788778).

The spelling of 12126657 in words is "twelve million, one hundred twenty-six thousand, six hundred fifty-seven".