12642238 has 8 divisors (see below), whose sum is σ = 21672432. Its totient is φ = 5418096.

The previous prime is 12642211. The next prime is 12642263. The reversal of 12642238 is 83224621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451495 + ... + 451522.

It is an arithmetic number, because the mean of its divisors is an integer number (2709054).

Almost surely, 2^12642238 is an apocalyptic number.

12642238 is a deficient number, since it is larger than the sum of its proper divisors (9030194).

12642238 is an equidigital number, since it uses as much as digits as its factorization.

12642238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903026.

The product of its digits is 4608, while the sum is 28.

The square root of 12642238 is about 3555.5924963359. The cubic root of 12642238 is about 232.9564041308.

Adding to 12642238 its reverse (83224621), we get a palindrome (95866859).

It can be divided in two parts, 12642 and 238, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 12642238 in words is "twelve million, six hundred forty-two thousand, two hundred thirty-eight".