2122720 has 24 divisors (see below), whose sum is σ = 5015304. Its totient is φ = 849024.

The previous prime is 2122711. The next prime is 2122721. The reversal of 2122720 is 272212.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2122694 and 2122703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6474 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (208971).

2^2122720 is an apocalyptic number.

2122720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122720 is an abundant number, since it is smaller than the sum of its proper divisors (2892584).

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

2122720 is a wasteful number, since it uses less digits than its factorization.

2122720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13282 (or 13274 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2122720 is about 1456.9557302815. The cubic root of 2122720 is about 128.5180825134.

Adding to 2122720 its reverse (272212), we get a palindrome (2394932).

The spelling of 2122720 in words is "two million, one hundred twenty-two thousand, seven hundred twenty".