75250521 has 12 divisors (see below), whose sum is σ = 109046548. Its totient is φ = 50004864.

The previous prime is 75250519. The next prime is 75250537. The reversal of 75250521 is 12505257.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35105625 + 40144896 = 5925^2 + 6336^2 .

It is not a de Polignac number, because 75250521 - 2¹ = 75250519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75250501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10540 + ... + 16173.

Almost surely, 2^75250521 is an apocalyptic number.

It is an amenable number.

75250521 is a deficient number, since it is larger than the sum of its proper divisors (33796027).

75250521 is a wasteful number, since it uses less digits than its factorization.

75250521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27032 (or 27029 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 75250521 is about 8674.7058163375. The cubic root of 75250521 is about 422.1853610197.

Adding to 75250521 its reverse (12505257), we get a palindrome (87755778).

The spelling of 75250521 in words is "seventy-five million, two hundred fifty thousand, five hundred twenty-one".