11777281 has 4 divisors (see below), whose sum is σ = 11909700. Its totient is φ = 11644864.

The previous prime is 11777279. The next prime is 11777287. The reversal of 11777281 is 18277711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18277711 = 263 ⋅69497.

It can be written as a sum of positive squares in 2 ways, for example, as 2873025 + 8904256 = 1695^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 11777281 - 2¹ = 11777279 is a prime.

It is a super-2 number, since 2×11777281² = 277408695505922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (11777287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66076 + ... + 66253.

It is an arithmetic number, because the mean of its divisors is an integer number (2977425).

Almost surely, 2^11777281 is an apocalyptic number.

It is an amenable number.

11777281 is a deficient number, since it is larger than the sum of its proper divisors (132419).

11777281 is an equidigital number, since it uses as much as digits as its factorization.

11777281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132418.

The product of its digits is 5488, while the sum is 34.

The square root of 11777281 is about 3431.8043359143. The cubic root of 11777281 is about 227.5176076216.

The spelling of 11777281 in words is "eleven million, seven hundred seventy-seven thousand, two hundred eighty-one".