2121441 has 8 divisors (see below), whose sum is σ = 3232704. Its totient is φ = 1212240.

The previous prime is 2121433. The next prime is 2121443. The reversal of 2121441 is 1441212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121441 - 2³ = 2121433 is a prime.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121441.

It is not an unprimeable number, because it can be changed into a prime (2121443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50490 + ... + 50531.

It is an arithmetic number, because the mean of its divisors is an integer number (404088).

2^2121441 is an apocalyptic number.

2121441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2121441 is a deficient number, since it is larger than the sum of its proper divisors (1111263).

2121441 is a wasteful number, since it uses less digits than its factorization.

2121441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101031.

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

The square root of 2121441 is about 1456.5167352283. The cubic root of 2121441 is about 128.4922653775.

Adding to 2121441 its reverse (1441212), we get a palindrome (3562653).

It can be divided in two parts, 212 and 1441, that added together give a triangular number (1653 = T₅₇).

The spelling of 2121441 in words is "two million, one hundred twenty-one thousand, four hundred forty-one".