2525221 has 2 divisors, whose sum is σ = 2525222. Its totient is φ = 2525220.

The previous prime is 2525219. The next prime is 2525227. The reversal of 2525221 is 1225252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 12996 = 1585^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525221 - 2¹ = 2525219 is a prime.

Together with 2525219, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2525227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262610 + 1262611.

It is an arithmetic number, because the mean of its divisors is an integer number (1262611).

2^2525221 is an apocalyptic number.

It is an amenable number.

2525221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2525221 is an equidigital number, since it uses as much as digits as its factorization.

2525221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 19.

The square root of 2525221 is about 1589.0943961892. The cubic root of 2525221 is about 136.1757567631.

The spelling of 2525221 in words is "two million, five hundred twenty-five thousand, two hundred twenty-one".