2111280 has 80 divisors (see below), whose sum is σ = 6904320. Its totient is φ = 532224.

The previous prime is 2111267. The next prime is 2111303. The reversal of 2111280 is 821112.

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 (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4329 + ... + 4791.

It is an arithmetic number, because the mean of its divisors is an integer number (86304).

2^2111280 is an apocalyptic number.

2111280 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 2111280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3452160).

2111280 is an abundant number, since it is smaller than the sum of its proper divisors (4793040).

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

2111280 is a wasteful number, since it uses less digits than its factorization.

2111280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2111280 is about 1453.0244320038. The cubic root of 2111280 is about 128.2867918412.

Adding to 2111280 its reverse (821112), we get a palindrome (2932392).

The spelling of 2111280 in words is "two million, one hundred eleven thousand, two hundred eighty".