11543240 has 32 divisors (see below), whose sum is σ = 27103680. Its totient is φ = 4416192.

The previous prime is 11543227. The next prime is 11543249. The reversal of 11543240 is 4234511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (11543249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5354 + ... + 7193.

It is an arithmetic number, because the mean of its divisors is an integer number (846990).

Almost surely, 2^11543240 is an apocalyptic number.

11543240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543240 is an abundant number, since it is smaller than the sum of its proper divisors (15560440).

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

11543240 is a wasteful number, since it uses less digits than its factorization.

11543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12581 (or 12577 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 11543240 is about 3397.5344001202. The cubic root of 11543240 is about 226.0004176775. Note that the first 3 decimals are identical.

Adding to 11543240 its reverse (4234511), we get a palindrome (15777751).

The spelling of 11543240 in words is "eleven million, five hundred forty-three thousand, two hundred forty".