7523561 has 2 divisors, whose sum is σ = 7523562. Its totient is φ = 7523560.

The previous prime is 7523539. The next prime is 7523567. The reversal of 7523561 is 1653257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7054336 + 469225 = 2656^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 7523561 - 2²² = 3329257 is a prime.

It is equal to p₅₀₉₇₃₅ and since 7523561 and 509735 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (7523567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3761780 + 3761781.

It is an arithmetic number, because the mean of its divisors is an integer number (3761781).

Almost surely, 2^7523561 is an apocalyptic number.

It is an amenable number.

7523561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7523561 is an equidigital number, since it uses as much as digits as its factorization.

7523561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 29.

The square root of 7523561 is about 2742.9110448573. The cubic root of 7523561 is about 195.9481415628.

The spelling of 7523561 in words is "seven million, five hundred twenty-three thousand, five hundred sixty-one".