2116540 has 24 divisors (see below), whose sum is σ = 4494672. Its totient is φ = 837120.

The previous prime is 2116537. The next prime is 2116559. The reversal of 2116540 is 456112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 2485.

It is an arithmetic number, because the mean of its divisors is an integer number (187278).

2^2116540 is an apocalyptic number.

2116540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116540 is an abundant number, since it is smaller than the sum of its proper divisors (2378132).

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

2116540 is a wasteful number, since it uses less digits than its factorization.

2116540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 1195 counting only the distinct ones).

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

The square root of 2116540 is about 1454.8333237866. The cubic root of 2116540 is about 128.3932405224.

It can be divided in two parts, 21 and 16540, that added together give a palindrome (16561).

The spelling of 2116540 in words is "two million, one hundred sixteen thousand, five hundred forty".