12661238 has 4 divisors (see below), whose sum is σ = 18991860. Its totient is φ = 6330618.

The previous prime is 12661213. The next prime is 12661241. The reversal of 12661238 is 83216621.

12661238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83216621 = 317 ⋅262513.

It is a self number, because there is not a number n which added to its sum of digits gives 12661238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165308 + ... + 3165311.

It is an arithmetic number, because the mean of its divisors is an integer number (4747965).

Almost surely, 2^12661238 is an apocalyptic number.

12661238 is a deficient number, since it is larger than the sum of its proper divisors (6330622).

12661238 is an equidigital number, since it uses as much as digits as its factorization.

12661238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330621.

The product of its digits is 3456, while the sum is 29.

The square root of 12661238 is about 3558.2633404514. The cubic root of 12661238 is about 233.0730489887.

Adding to 12661238 its reverse (83216621), we get a palindrome (95877859).

The spelling of 12661238 in words is "twelve million, six hundred sixty-one thousand, two hundred thirty-eight".