11278081 has 4 divisors (see below), whose sum is σ = 11582932. Its totient is φ = 10973232.

The previous prime is 11278067. The next prime is 11278097. The reversal of 11278081 is 18087211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6677056 + 4601025 = 2584^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 11278081 - 2⁵ = 11278049 is a prime.

It is a super-2 number, since 2×11278081² = 254390222085122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11278051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152370 + ... + 152443.

It is an arithmetic number, because the mean of its divisors is an integer number (2895733).

Almost surely, 2^11278081 is an apocalyptic number.

It is an amenable number.

11278081 is a deficient number, since it is larger than the sum of its proper divisors (304851).

11278081 is an equidigital number, since it uses as much as digits as its factorization.

11278081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304850.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 11278081 is about 3358.2854256302. The cubic root of 11278081 is about 224.2565155013.

The spelling of 11278081 in words is "eleven million, two hundred seventy-eight thousand, eighty-one".