7037521 has 2 divisors, whose sum is σ = 7037522. Its totient is φ = 7037520.

The previous prime is 7037489. The next prime is 7037531. The reversal of 7037521 is 1257307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3651921 + 3385600 = 1911^2 + 1840^2 .

It is an emirp because it is prime and its reverse (1257307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7037521 - 2⁵ = 7037489 is a prime.

It is not a weakly prime, because it can be changed into another prime (7037531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3518760 + 3518761.

It is an arithmetic number, because the mean of its divisors is an integer number (3518761).

Almost surely, 2^7037521 is an apocalyptic number.

It is an amenable number.

7037521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7037521 is an equidigital number, since it uses as much as digits as its factorization.

7037521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 7037521 is about 2652.8326370127. The cubic root of 7037521 is about 191.6342955623.

The spelling of 7037521 in words is "seven million, thirty-seven thousand, five hundred twenty-one".