2387221 has 2 divisors, whose sum is σ = 2387222. Its totient is φ = 2387220.

The previous prime is 2387207. The next prime is 2387237. The reversal of 2387221 is 1227832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2387025 + 196 = 1545^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 2387221 - 2¹⁹ = 1862933 is a prime.

It is a d-powerful number, because it can be written as 2¹² + 3⁹ + 8⁴ + 7² + 2¹⁸ + 2²¹ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2387201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1193610 + 1193611.

It is an arithmetic number, because the mean of its divisors is an integer number (1193611).

2^2387221 is an apocalyptic number.

It is an amenable number.

2387221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2387221 is an equidigital number, since it uses as much as digits as its factorization.

2387221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 2387221 is about 1545.0634291187. The cubic root of 2387221 is about 133.6485369020.

The spelling of 2387221 in words is "two million, three hundred eighty-seven thousand, two hundred twenty-one".