2123280 has 80 divisors (see below), whose sum is σ = 7320960. Its totient is φ = 565632.

The previous prime is 2123279. The next prime is 2123281. The reversal of 2123280 is 823212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2123279) and next prime (2123281).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2123281) 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, 1669 + ... + 2651.

It is an arithmetic number, because the mean of its divisors is an integer number (91512).

2^2123280 is an apocalyptic number.

2123280 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 2123280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3660480).

2123280 is an abundant number, since it is smaller than the sum of its proper divisors (5197680).

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

2123280 is a wasteful number, since it uses less digits than its factorization.

2123280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2123280 is about 1457.1478991509. The cubic root of 2123280 is about 128.5293830772.

Adding to 2123280 its reverse (823212), we get a palindrome (2946492).

It can be divided in two parts, 21232 and 80, that added together give a palindrome (21312).

The spelling of 2123280 in words is "two million, one hundred twenty-three thousand, two hundred eighty".