11140405 has 4 divisors (see below), whose sum is σ = 13368492. Its totient is φ = 8912320.

The previous prime is 11140399. The next prime is 11140421. The reversal of 11140405 is 50404111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50404111 = 1279 ⋅39409.

It can be written as a sum of positive squares in 2 ways, for example, as 1418481 + 9721924 = 1191^2 + 3118^2 .

It is not a de Polignac number, because 11140405 - 2⁷ = 11140277 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, 1114036 + ... + 1114045.

It is an arithmetic number, because the mean of its divisors is an integer number (3342123).

Almost surely, 2^11140405 is an apocalyptic number.

It is an amenable number.

11140405 is a deficient number, since it is larger than the sum of its proper divisors (2228087).

11140405 is an equidigital number, since it uses as much as digits as its factorization.

11140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228086.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 11140405 is about 3337.7245242830. The cubic root of 11140405 is about 223.3402475521.

Adding to 11140405 its reverse (50404111), we get a palindrome (61544516).

The spelling of 11140405 in words is "eleven million, one hundred forty thousand, four hundred five".