11756138 has 4 divisors (see below), whose sum is σ = 17634210. Its totient is φ = 5878068.

The previous prime is 11756137. The next prime is 11756141. The reversal of 11756138 is 83165711.

11756138 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: 83165711 = 991 ⋅83921.

It can be written as a sum of positive squares in only one way, i.e., 9815689 + 1940449 = 3133^2 + 1393^2 .

It is a super-3 number, since 3×11756138³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11756137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2939033 + ... + 2939036.

Almost surely, 2^11756138 is an apocalyptic number.

11756138 is a deficient number, since it is larger than the sum of its proper divisors (5878072).

11756138 is an equidigital number, since it uses as much as digits as its factorization.

11756138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878071.

The product of its digits is 5040, while the sum is 32.

The square root of 11756138 is about 3428.7225026240. The cubic root of 11756138 is about 227.3813767928.

The spelling of 11756138 in words is "eleven million, seven hundred fifty-six thousand, one hundred thirty-eight".