2050721 has 2 divisors, whose sum is σ = 2050722. Its totient is φ = 2050720.

The previous prime is 2050717. The next prime is 2050733. The reversal of 2050721 is 1270502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 132496 = 1385^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2050721 - 2² = 2050717 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2050721.

It is not a weakly prime, because it can be changed into another prime (2050771) 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, 1025360 + 1025361.

It is an arithmetic number, because the mean of its divisors is an integer number (1025361).

2^2050721 is an apocalyptic number.

It is an amenable number.

2050721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2050721 is an equidigital number, since it uses as much as digits as its factorization.

2050721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 2050721 is about 1432.0338683146. The cubic root of 2050721 is about 127.0483003915.

The spelling of 2050721 in words is "two million, fifty thousand, seven hundred twenty-one".