12133657 has 4 divisors (see below), whose sum is σ = 12197376. Its totient is φ = 12069940.

The previous prime is 12133651. The next prime is 12133691. The reversal of 12133657 is 75633121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75633121 = 3449 ⋅21929.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12133657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12133651) 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 3 ways as a sum of consecutive naturals, for example, 31573 + ... + 31954.

It is an arithmetic number, because the mean of its divisors is an integer number (3049344).

Almost surely, 2^12133657 is an apocalyptic number.

It is an amenable number.

12133657 is a deficient number, since it is larger than the sum of its proper divisors (63719).

12133657 is an equidigital number, since it uses as much as digits as its factorization.

12133657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63718.

The product of its digits is 3780, while the sum is 28.

The square root of 12133657 is about 3483.3399202490. The cubic root of 12133657 is about 229.7897069648.

Adding to 12133657 its reverse (75633121), we get a palindrome (87766778).

The spelling of 12133657 in words is "twelve million, one hundred thirty-three thousand, six hundred fifty-seven".