7097521 has 2 divisors, whose sum is σ = 7097522. Its totient is φ = 7097520.

The previous prime is 7097491. The next prime is 7097549. The reversal of 7097521 is 1257907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 625 = 2664^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 7097521 - 2¹⁵ = 7064753 is a prime.

It is not a weakly prime, because it can be changed into another prime (7097591) 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, 3548760 + 3548761.

It is an arithmetic number, because the mean of its divisors is an integer number (3548761).

Almost surely, 2^7097521 is an apocalyptic number.

It is an amenable number.

7097521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7097521 is an equidigital number, since it uses as much as digits as its factorization.

7097521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 7097521 is about 2664.1173022223. The cubic root of 7097521 is about 192.1773625120.

The spelling of 7097521 in words is "seven million, ninety-seven thousand, five hundred twenty-one".