12133642 has 4 divisors (see below), whose sum is σ = 18200466. Its totient is φ = 6066820.

The previous prime is 12133621. The next prime is 12133643. The reversal of 12133642 is 24633121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24633121 = 1013 ⋅24317.

It can be written as a sum of positive squares in only one way, i.e., 11029041 + 1104601 = 3321^2 + 1051^2 .

It is not an unprimeable number, because it can be changed into a prime (12133643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3033409 + ... + 3033412.

Almost surely, 2^12133642 is an apocalyptic number.

12133642 is a deficient number, since it is larger than the sum of its proper divisors (6066824).

12133642 is an equidigital number, since it uses as much as digits as its factorization.

12133642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066823.

The product of its digits is 864, while the sum is 22.

The square root of 12133642 is about 3483.3377671423. The cubic root of 12133642 is about 229.7896122738.

Adding to 12133642 its reverse (24633121), we get a palindrome (36766763).

The spelling of 12133642 in words is "twelve million, one hundred thirty-three thousand, six hundred forty-two".