12049138 has 4 divisors (see below), whose sum is σ = 18073710. Its totient is φ = 6024568.

The previous prime is 12049133. The next prime is 12049151. The reversal of 12049138 is 83194021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83194021 = 3491 ⋅23831.

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 779689 = 3357^2 + 883^2 .

It is not an unprimeable number, because it can be changed into a prime (12049133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3012283 + ... + 3012286.

Almost surely, 2^12049138 is an apocalyptic number.

12049138 is a deficient number, since it is larger than the sum of its proper divisors (6024572).

12049138 is an equidigital number, since it uses as much as digits as its factorization.

12049138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6024571.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 12049138 is about 3471.1868287374. The cubic root of 12049138 is about 229.2549172102.

The spelling of 12049138 in words is "twelve million, forty-nine thousand, one hundred thirty-eight".