7250209 has 2 divisors, whose sum is σ = 7250210. Its totient is φ = 7250208.

The previous prime is 7250197. The next prime is 7250219. The reversal of 7250209 is 9020527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4264225 + 2985984 = 2065^2 + 1728^2 .

It is an emirp because it is prime and its reverse (9020527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7250209 is a prime.

It is a super-3 number, since 3×7250209³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (7250219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3625104 + 3625105.

It is an arithmetic number, because the mean of its divisors is an integer number (3625105).

Almost surely, 2^7250209 is an apocalyptic number.

It is an amenable number.

7250209 is a deficient number, since it is larger than the sum of its proper divisors (1).

7250209 is an equidigital number, since it uses as much as digits as its factorization.

7250209 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 25.

The square root of 7250209 is about 2692.6212136132. The cubic root of 7250209 is about 193.5456918140.

The spelling of 7250209 in words is "seven million, two hundred fifty thousand, two hundred nine".