11381005 has 4 divisors (see below), whose sum is σ = 13657212. Its totient is φ = 9104800.

The previous prime is 11380979. The next prime is 11381011. The reversal of 11381005 is 50018311.

11381005 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50018311 = 7 ⋅7145473.

It can be written as a sum of positive squares in 2 ways, for example, as 3052009 + 8328996 = 1747^2 + 2886^2 .

It is not a de Polignac number, because 11381005 - 2¹⁷ = 11249933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138096 + ... + 1138105.

It is an arithmetic number, because the mean of its divisors is an integer number (3414303).

Almost surely, 2^11381005 is an apocalyptic number.

It is an amenable number.

11381005 is a deficient number, since it is larger than the sum of its proper divisors (2276207).

11381005 is an equidigital number, since it uses as much as digits as its factorization.

11381005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276206.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 11381005 is about 3373.5745137762. The cubic root of 11381005 is about 224.9366405960.

Adding to 11381005 its reverse (50018311), we get a palindrome (61399316).

It can be divided in two parts, 113 and 81005, that added together give a palindrome (81118).

The spelling of 11381005 in words is "eleven million, three hundred eighty-one thousand, five".