7337521 has 2 divisors, whose sum is σ = 7337522. Its totient is φ = 7337520.

The previous prime is 7337509. The next prime is 7337567. The reversal of 7337521 is 1257337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4410000 + 2927521 = 2100^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 7337521 - 2⁹ = 7337009 is a prime.

It is an Ulam number.

7337521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7337521.

It is not a weakly prime, because it can be changed into another prime (7337221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3668760 + 3668761.

It is an arithmetic number, because the mean of its divisors is an integer number (3668761).

Almost surely, 2^7337521 is an apocalyptic number.

It is an amenable number.

7337521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7337521 is an equidigital number, since it uses as much as digits as its factorization.

7337521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 28.

The square root of 7337521 is about 2708.7858903944. The cubic root of 7337521 is about 194.3195304615.

The spelling of 7337521 in words is "seven million, three hundred thirty-seven thousand, five hundred twenty-one".