2025721 has 2 divisors, whose sum is σ = 2025722. Its totient is φ = 2025720.

The previous prime is 2025719. The next prime is 2025733. The reversal of 2025721 is 1275202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1590121 + 435600 = 1261^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025721 - 2¹ = 2025719 is a prime.

Together with 2025719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2025791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1012860 + 1012861.

It is an arithmetic number, because the mean of its divisors is an integer number (1012861).

2^2025721 is an apocalyptic number.

It is an amenable number.

2025721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2025721 is an equidigital number, since it uses as much as digits as its factorization.

2025721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2025721 is about 1423.2782581070. The cubic root of 2025721 is about 126.5299131976.

The spelling of 2025721 in words is "two million, twenty-five thousand, seven hundred twenty-one".