11785261 has 4 divisors (see below), whose sum is σ = 11978524. Its totient is φ = 11592000.

The previous prime is 11785259. The next prime is 11785271. The reversal of 11785261 is 16258711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16258711 = 7 ⋅2322673.

It can be written as a sum of positive squares in 2 ways, for example, as 2268036 + 9517225 = 1506^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 11785261 - 2¹ = 11785259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11785201) 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, 96540 + ... + 96661.

It is an arithmetic number, because the mean of its divisors is an integer number (2994631).

Almost surely, 2^11785261 is an apocalyptic number.

It is an amenable number.

11785261 is a deficient number, since it is larger than the sum of its proper divisors (193263).

11785261 is an equidigital number, since it uses as much as digits as its factorization.

11785261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193262.

The product of its digits is 3360, while the sum is 31.

The square root of 11785261 is about 3432.9667927319. The cubic root of 11785261 is about 227.5689828243.

The spelling of 11785261 in words is "eleven million, seven hundred eighty-five thousand, two hundred sixty-one".