11530138 has 4 divisors (see below), whose sum is σ = 17295210. Its totient is φ = 5765068.

The previous prime is 11530133. The next prime is 11530157. The reversal of 11530138 is 83103511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83103511 = 19 ⋅4373869.

It can be written as a sum of positive squares in only one way, i.e., 11512449 + 17689 = 3393^2 + 133^2 .

It is not an unprimeable number, because it can be changed into a prime (11530133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2882533 + ... + 2882536.

Almost surely, 2^11530138 is an apocalyptic number.

11530138 is a deficient number, since it is larger than the sum of its proper divisors (5765072).

11530138 is an equidigital number, since it uses as much as digits as its factorization.

11530138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765071.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 11530138 is about 3395.6056897113. The cubic root of 11530138 is about 225.9148790568.

Adding to 11530138 its reverse (83103511), we get a palindrome (94633649).

The spelling of 11530138 in words is "eleven million, five hundred thirty thousand, one hundred thirty-eight".