11440081 has 4 divisors (see below), whose sum is σ = 11465572. Its totient is φ = 11414592.

The previous prime is 11440073. The next prime is 11440097. The reversal of 11440081 is 18004411.

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 5363856 + 6076225 = 2316^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 11440081 - 2³ = 11440073 is a prime.

It is a super-2 number, since 2×11440081² = 261750906573122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11440061) 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, 12060 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (2866393).

Almost surely, 2^11440081 is an apocalyptic number.

It is an amenable number.

11440081 is a deficient number, since it is larger than the sum of its proper divisors (25491).

11440081 is an equidigital number, since it uses as much as digits as its factorization.

11440081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25490.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 11440081 is about 3382.3188791124. The cubic root of 11440081 is about 225.3251660633.

Adding to 11440081 its reverse (18004411), we get a palindrome (29444492).

It can be divided in two parts, 114400 and 81, that added together give a triangular number (114481 = T₄₇₈).

The spelling of 11440081 in words is "eleven million, four hundred forty thousand, eighty-one".