75305745 has 12 divisors (see below), whose sum is σ = 130530036. Its totient is φ = 40163040.

The previous prime is 75305731. The next prime is 75305777. The reversal of 75305745 is 54750357.

It can be written as a sum of positive squares in 2 ways, for example, as 8573184 + 66732561 = 2928^2 + 8169^2 .

It is not a de Polignac number, because 75305745 - 2⁴ = 75305729 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 836686 + ... + 836775.

It is an arithmetic number, because the mean of its divisors is an integer number (10877503).

Almost surely, 2^75305745 is an apocalyptic number.

It is an amenable number.

75305745 is a deficient number, since it is larger than the sum of its proper divisors (55224291).

75305745 is a wasteful number, since it uses less digits than its factorization.

75305745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673472 (or 1673469 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 36.

The square root of 75305745 is about 8677.8882799907. Note that the first 3 decimals coincide. The cubic root of 75305745 is about 422.2886119699.

The spelling of 75305745 in words is "seventy-five million, three hundred five thousand, seven hundred forty-five".