75021745 has 16 divisors (see below), whose sum is σ = 95541120. Its totient is φ = 56429824.

The previous prime is 75021733. The next prime is 75021769. The reversal of 75021745 is 54712057.

It is a cyclic number.

It is not a de Polignac number, because 75021745 - 2¹¹ = 75019697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (5971320).

Almost surely, 2^75021745 is an apocalyptic number.

It is an amenable number.

75021745 is a deficient number, since it is larger than the sum of its proper divisors (20519375).

75021745 is a wasteful number, since it uses less digits than its factorization.

75021745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11144.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 75021745 is about 8661.5093950189. The cubic root of 75021745 is about 421.7570852533.

The spelling of 75021745 in words is "seventy-five million, twenty-one thousand, seven hundred forty-five".