2100860 has 48 divisors (see below), whose sum is σ = 4826304. Its totient is φ = 764928.

The previous prime is 2100859. The next prime is 2100869. The reversal of 2100860 is 680012.

It is a super-2 number, since 2×2100860² = 8827225479200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100869) 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, 12497 + ... + 12663.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2^2100860 is an apocalyptic number.

2100860 is a gapful number since it is divisible by the number (20) 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 2100860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2413152).

2100860 is an abundant number, since it is smaller than the sum of its proper divisors (2725444).

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

2100860 is a wasteful number, since it uses less digits than its factorization.

2100860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2100860 is about 1449.4343724364. The cubic root of 2100860 is about 128.0753950349.

Adding to 2100860 its reverse (680012), we get a palindrome (2780872).

The spelling of 2100860 in words is "two million, one hundred thousand, eight hundred sixty".