75504145 has 4 divisors (see below), whose sum is σ = 90604980. Its totient is φ = 60403312.

The previous prime is 75504103. The next prime is 75504151. The reversal of 75504145 is 54140557.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25928464 + 49575681 = 5092^2 + 7041^2 .

It is a cyclic number.

It is not a de Polignac number, because 75504145 - 2⁹ = 75503633 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7550410 + ... + 7550419.

It is an arithmetic number, because the mean of its divisors is an integer number (22651245).

Almost surely, 2^75504145 is an apocalyptic number.

It is an amenable number.

75504145 is a deficient number, since it is larger than the sum of its proper divisors (15100835).

75504145 is a wasteful number, since it uses less digits than its factorization.

75504145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100834.

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 75504145 is about 8689.3121131652. The cubic root of 75504145 is about 422.6591396585.

The spelling of 75504145 in words is "seventy-five million, five hundred four thousand, one hundred forty-five".