2172860 has 12 divisors (see below), whose sum is σ = 4563048. Its totient is φ = 869136.

The previous prime is 2172853. The next prime is 2172869. The reversal of 2172860 is 682712.

2172860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172869) 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 3 ways as a sum of consecutive naturals, for example, 54302 + ... + 54341.

It is an arithmetic number, because the mean of its divisors is an integer number (380254).

2^2172860 is an apocalyptic number.

2172860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172860 is an abundant number, since it is smaller than the sum of its proper divisors (2390188).

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

2172860 is a wasteful number, since it uses less digits than its factorization.

2172860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108652 (or 108650 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2172860 is about 1474.0624138753. The cubic root of 2172860 is about 129.5221112794.

The spelling of 2172860 in words is "two million, one hundred seventy-two thousand, eight hundred sixty".