2340721 has 2 divisors, whose sum is σ = 2340722. Its totient is φ = 2340720.

The previous prime is 2340719. The next prime is 2340727. The reversal of 2340721 is 1270432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2283121 + 57600 = 1511^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340721 - 2¹ = 2340719 is a prime.

Together with 2340719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2340727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170360 + 1170361.

It is an arithmetic number, because the mean of its divisors is an integer number (1170361).

2^2340721 is an apocalyptic number.

It is an amenable number.

2340721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340721 is an equidigital number, since it uses as much as digits as its factorization.

2340721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 2340721 is about 1529.9415021497. The cubic root of 2340721 is about 132.7750734957.

The spelling of 2340721 in words is "two million, three hundred forty thousand, seven hundred twenty-one".