2421121 has 4 divisors (see below), whose sum is σ = 2426544. Its totient is φ = 2415700.

The previous prime is 2421119. The next prime is 2421137. The reversal of 2421121 is 1211242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2421121 - 2¹ = 2421119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975 + ... + 2956.

It is an arithmetic number, because the mean of its divisors is an integer number (606636).

2^2421121 is an apocalyptic number.

It is an amenable number.

2421121 is a deficient number, since it is larger than the sum of its proper divisors (5423).

2421121 is an equidigital number, since it uses as much as digits as its factorization.

2421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5422.

The product of its digits is 32, while the sum is 13.

The square root of 2421121 is about 1555.9951799411. The cubic root of 2421121 is about 134.2781960804.

Adding to 2421121 its reverse (1211242), we get a palindrome (3632363).

The spelling of 2421121 in words is "two million, four hundred twenty-one thousand, one hundred twenty-one".