2121424 has 10 divisors (see below), whose sum is σ = 4110290. Its totient is φ = 1060704.

The previous prime is 2121403. The next prime is 2121433. The reversal of 2121424 is 4241212.

It can be written as a sum of positive squares in only one way, i.e., 1871424 + 250000 = 1368^2 + 500^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 132589 = 2121424 / (2 + 1 + 2 + 1 + 4 + 2 + 4).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2121398 and 2121407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66279 + ... + 66310.

It is an arithmetic number, because the mean of its divisors is an integer number (411029).

2^2121424 is an apocalyptic number.

It is an amenable number.

2121424 is a deficient number, since it is larger than the sum of its proper divisors (1988866).

2121424 is a wasteful number, since it uses less digits than its factorization.

2121424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132597 (or 132591 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 2121424 is about 1456.5108993756. The cubic root of 2121424 is about 128.4919221557.

Adding to 2121424 its reverse (4241212), we get a palindrome (6362636).

The spelling of 2121424 in words is "two million, one hundred twenty-one thousand, four hundred twenty-four".