11855251 has 4 divisors (see below), whose sum is σ = 11900592. Its totient is φ = 11809912.

The previous prime is 11855231. The next prime is 11855267. The reversal of 11855251 is 15255811.

11855251 = T₁₅₉ + T₁₆₀ + ... + T₄₂₁.

11855251 is digitally balanced in base 3, 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: 15255811 = 2081 ⋅7331.

It is a cyclic number.

It is not a de Polignac number, because 11855251 - 2⁵ = 11855219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11855231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22276 + ... + 22801.

It is an arithmetic number, because the mean of its divisors is an integer number (2975148).

Almost surely, 2^11855251 is an apocalyptic number.

11855251 is a deficient number, since it is larger than the sum of its proper divisors (45341).

11855251 is an equidigital number, since it uses as much as digits as its factorization.

11855251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45340.

The product of its digits is 2000, while the sum is 28.

The square root of 11855251 is about 3443.1455095595. The cubic root of 11855251 is about 228.0185875377.

The spelling of 11855251 in words is "eleven million, eight hundred fifty-five thousand, two hundred fifty-one".