11543140 has 48 divisors (see below), whose sum is σ = 28393344. Its totient is φ = 3859200.

The previous prime is 11543123. The next prime is 11543143. The reversal of 11543140 is 4134511.

11543140 = T₁₇₅ + T₁₇₆ + ... + T₄₂₀.

It is not an unprimeable number, because it can be changed into a prime (11543143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4735 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (591528).

Almost surely, 2^11543140 is an apocalyptic number.

11543140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11543140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14196672).

11543140 is an abundant number, since it is smaller than the sum of its proper divisors (16850204).

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

11543140 is a wasteful number, since it uses less digits than its factorization.

11543140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068 (or 2066 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 11543140 is about 3397.5196835339. The cubic root of 11543140 is about 225.9997650558. Note that the first 3 decimals are identical.

Adding to 11543140 its reverse (4134511), we get a palindrome (15677651).

The spelling of 11543140 in words is "eleven million, five hundred forty-three thousand, one hundred forty".