11855257 has 4 divisors (see below), whose sum is σ = 11888640. Its totient is φ = 11821876.

The previous prime is 11855231. The next prime is 11855267. The reversal of 11855257 is 75255811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75255811 = 71 ⋅1059941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11855257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11855267) 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, 16153 + ... + 16870.

It is an arithmetic number, because the mean of its divisors is an integer number (2972160).

Almost surely, 2^11855257 is an apocalyptic number.

It is an amenable number.

11855257 is a deficient number, since it is larger than the sum of its proper divisors (33383).

11855257 is an equidigital number, since it uses as much as digits as its factorization.

11855257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33382.

The product of its digits is 14000, while the sum is 34.

The square root of 11855257 is about 3443.1463808557. The cubic root of 11855257 is about 228.0186260048.

The spelling of 11855257 in words is "eleven million, eight hundred fifty-five thousand, two hundred fifty-seven".