2120280 has 32 divisors (see below), whose sum is σ = 6361200. Its totient is φ = 565376.

The previous prime is 2120269. The next prime is 2120297. The reversal of 2120280 is 820212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8715 + ... + 8954.

2^2120280 is an apocalyptic number.

2120280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120280 is an abundant number, since it is smaller than the sum of its proper divisors (4240920).

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

2120280 is a wasteful number, since it uses less digits than its factorization.

2120280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17683 (or 17679 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2120280 is about 1456.1181270762. The cubic root of 2120280 is about 128.4688211333.

Adding to 2120280 its reverse (820212), we get a palindrome (2940492).

It can be divided in two parts, 21 and 20280, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 2120280 in words is "two million, one hundred twenty thousand, two hundred eighty".