2124420 has 24 divisors (see below), whose sum is σ = 5948544. Its totient is φ = 566496.

The previous prime is 2124403. The next prime is 2124431. The reversal of 2124420 is 244212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2124420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17644 + ... + 17763.

It is an arithmetic number, because the mean of its divisors is an integer number (247856).

2^2124420 is an apocalyptic number.

2124420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2124420 is an abundant number, since it is smaller than the sum of its proper divisors (3824124).

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

2124420 is a wasteful number, since it uses less digits than its factorization.

2124420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35419 (or 35417 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2124420 is about 1457.5390217761. The cubic root of 2124420 is about 128.5523816582.

Adding to 2124420 its reverse (244212), we get a palindrome (2368632).

The spelling of 2124420 in words is "two million, one hundred twenty-four thousand, four hundred twenty".