75240305 has 16 divisors (see below), whose sum is σ = 103509120. Its totient is φ = 51432192.

The previous prime is 75240299. The next prime is 75240331. The reversal of 75240305 is 50304257.

It is not a de Polignac number, because 75240305 - 2¹⁶ = 75174769 is a prime.

It is a super-2 number, since 2×75240305² = 11322206992986050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 8606 + ... + 14984.

It is an arithmetic number, because the mean of its divisors is an integer number (6469320).

Almost surely, 2^75240305 is an apocalyptic number.

It is an amenable number.

75240305 is a deficient number, since it is larger than the sum of its proper divisors (28268815).

75240305 is a wasteful number, since it uses less digits than its factorization.

75240305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 75240305 is about 8674.1169579387. The cubic root of 75240305 is about 422.1662548803.

The spelling of 75240305 in words is "seventy-five million, two hundred forty thousand, three hundred five".