2121241 has 2 divisors, whose sum is σ = 2121242. Its totient is φ = 2121240.

The previous prime is 2121239. The next prime is 2121253. The reversal of 2121241 is 1421212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 495616 = 1275^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121241 - 2¹ = 2121239 is a prime.

Together with 2121239, it forms a pair of twin primes.

2121241 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2121271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060620 + 1060621.

It is an arithmetic number, because the mean of its divisors is an integer number (1060621).

2^2121241 is an apocalyptic number.

It is an amenable number.

2121241 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121241 is an equidigital number, since it uses as much as digits as its factorization.

2121241 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2121241 is about 1456.4480766577. The cubic root of 2121241 is about 128.4882273579.

Adding to 2121241 its reverse (1421212), we get a palindrome (3542453).

The spelling of 2121241 in words is "two million, one hundred twenty-one thousand, two hundred forty-one".