12206138 has 8 divisors (see below), whose sum is σ = 20924832. Its totient is φ = 5231196.

The previous prime is 12206101. The next prime is 12206143. The reversal of 12206138 is 83160221.

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

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, 435920 + ... + 435947.

It is an arithmetic number, because the mean of its divisors is an integer number (2615604).

Almost surely, 2^12206138 is an apocalyptic number.

12206138 is a deficient number, since it is larger than the sum of its proper divisors (8718694).

12206138 is an equidigital number, since it uses as much as digits as its factorization.

12206138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871876.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12206138 is about 3493.7283809707. The cubic root of 12206138 is about 230.2463522957.

Adding to 12206138 its reverse (83160221), we get a palindrome (95366359).

The spelling of 12206138 in words is "twelve million, two hundred six thousand, one hundred thirty-eight".