2059721 has 2 divisors, whose sum is σ = 2059722. Its totient is φ = 2059720.

The previous prime is 2059711. The next prime is 2059723. The reversal of 2059721 is 1279502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 978121 = 1040^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2059721 - 2¹⁰ = 2058697 is a prime.

Together with 2059723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2059723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1029860 + 1029861.

It is an arithmetic number, because the mean of its divisors is an integer number (1029861).

2^2059721 is an apocalyptic number.

It is an amenable number.

2059721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2059721 is an equidigital number, since it uses as much as digits as its factorization.

2059721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2059721 is about 1435.1728118941. The cubic root of 2059721 is about 127.2338881334.

The spelling of 2059721 in words is "two million, fifty-nine thousand, seven hundred twenty-one".