2100540 has 48 divisors (see below), whose sum is σ = 6336288. Its totient is φ = 516864.

The previous prime is 2100533. The next prime is 2100541. The reversal of 2100540 is 450012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100541) 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, 567 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (132006).

2^2100540 is an apocalyptic number.

2100540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100540 is an abundant number, since it is smaller than the sum of its proper divisors (4235748).

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

2100540 is a wasteful number, since it uses less digits than its factorization.

2100540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2100540 is about 1449.3239803439. The cubic root of 2100540 is about 128.0688919509.

Adding to 2100540 its reverse (450012), we get a palindrome (2550552).

The spelling of 2100540 in words is "two million, one hundred thousand, five hundred forty".