11906 has 4 divisors (see below), whose sum is σ = 17862. Its totient is φ = 5952.

The previous prime is 11903. The next prime is 11909. The reversal of 11906 is 60911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60911 = 17 ⋅3583.

It is an interprime number because it is at equal distance from previous prime (11903) and next prime (11909).

It can be written as a sum of positive squares in only one way, i.e., 11881 + 25 = 109^2 + 5^2 .

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (11903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2975 + ... + 2978.

2¹¹⁹⁰⁶ is an apocalyptic number.

11906 is a deficient number, since it is larger than the sum of its proper divisors (5956).

11906 is an equidigital number, since it uses as much as digits as its factorization.

11906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 11906 is about 109.1146186356. The cubic root of 11906 is about 22.8343485557.

It can be divided in two parts, 1190 and 6, that multiplied together give a triangular number (7140 = T₁₁₉).

The spelling of 11906 in words is "eleven thousand, nine hundred six".