2011540 has 24 divisors (see below), whose sum is σ = 4324320. Its totient is φ = 785568.

The previous prime is 2011531. The next prime is 2011543. The reversal of 2011540 is 451102.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 2011540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310 + ... + 2029.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2^2011540 is an apocalyptic number.

2011540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011540 is an abundant number, since it is smaller than the sum of its proper divisors (2312780).

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

2011540 is a wasteful number, since it uses less digits than its factorization.

2011540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2011540 is about 1418.2877000101. The cubic root of 2011540 is about 126.2339652217.

Adding to 2011540 its reverse (451102), we get a palindrome (2462642).

The spelling of 2011540 in words is "two million, eleven thousand, five hundred forty".