2579221 has 2 divisors, whose sum is σ = 2579222. Its totient is φ = 2579220.

The previous prime is 2579209. The next prime is 2579249. The reversal of 2579221 is 1229752.

It is an a-pointer prime, because the next prime (2579249) can be obtained adding 2579221 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 98596 = 1575^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2579221 - 2¹⁹ = 2054933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2579221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2579201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289610 + 1289611.

It is an arithmetic number, because the mean of its divisors is an integer number (1289611).

2^2579221 is an apocalyptic number.

It is an amenable number.

2579221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2579221 is an equidigital number, since it uses as much as digits as its factorization.

2579221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 2579221 is about 1605.9953300057. The cubic root of 2579221 is about 137.1395916778.

The spelling of 2579221 in words is "two million, five hundred seventy-nine thousand, two hundred twenty-one".