2520121 has 2 divisors, whose sum is σ = 2520122. Its totient is φ = 2520120.

The previous prime is 2520079. The next prime is 2520127. The reversal of 2520121 is 1210252.

2520121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 881721 = 1280^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520121 - 2²¹ = 422969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2520127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260060 + 1260061.

It is an arithmetic number, because the mean of its divisors is an integer number (1260061).

2^2520121 is an apocalyptic number.

It is an amenable number.

2520121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520121 is an equidigital number, since it uses as much as digits as its factorization.

2520121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2520121 is about 1587.4888975990. The cubic root of 2520121 is about 136.0840203137.

Adding to 2520121 its reverse (1210252), we get a palindrome (3730373).

The spelling of 2520121 in words is "two million, five hundred twenty thousand, one hundred twenty-one".