11143240 has 16 divisors (see below), whose sum is σ = 25072380. Its totient is φ = 4457280.

The previous prime is 11143219. The next prime is 11143243. The reversal of 11143240 is 4234111.

It can be written as a sum of positive squares in 2 ways, for example, as 10407076 + 736164 = 3226^2 + 858^2 .

It is not an unprimeable number, because it can be changed into a prime (11143243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139251 + ... + 139330.

Almost surely, 2^11143240 is an apocalyptic number.

11143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11143240 is an abundant number, since it is smaller than the sum of its proper divisors (13929140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11143240 is a wasteful number, since it uses less digits than its factorization.

11143240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278592 (or 278588 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 11143240 is about 3338.1491877985. The cubic root of 11143240 is about 223.3591910854.

Adding to 11143240 its reverse (4234111), we get a palindrome (15377351).

The spelling of 11143240 in words is "eleven million, one hundred forty-three thousand, two hundred forty".