7200521 has 2 divisors, whose sum is σ = 7200522. Its totient is φ = 7200520.

The previous prime is 7200517. The next prime is 7200551. The reversal of 7200521 is 1250027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 3200521 = 2000^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 7200521 - 2² = 7200517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7200521.

It is not a weakly prime, because it can be changed into another prime (7200511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3600260 + 3600261.

It is an arithmetic number, because the mean of its divisors is an integer number (3600261).

Almost surely, 2^7200521 is an apocalyptic number.

It is an amenable number.

7200521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7200521 is an equidigital number, since it uses as much as digits as its factorization.

7200521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 7200521 is about 2683.3786538616. The cubic root of 7200521 is about 193.1025344011.

Adding to 7200521 its reverse (1250027), we get a palindrome (8450548).

The spelling of 7200521 in words is "seven million, two hundred thousand, five hundred twenty-one".