75520145 has 8 divisors (see below), whose sum is σ = 93073704. Its totient is φ = 58783104.

The previous prime is 75520099. The next prime is 75520153. The reversal of 75520145 is 54102557.

It can be written as a sum of positive squares in 4 ways, for example, as 42354064 + 33166081 = 6508^2 + 5759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75520145 - 2¹⁰ = 75519121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203924 + ... + 204293.

It is an arithmetic number, because the mean of its divisors is an integer number (11634213).

Almost surely, 2^75520145 is an apocalyptic number.

It is an amenable number.

75520145 is a deficient number, since it is larger than the sum of its proper divisors (17553559).

75520145 is a wasteful number, since it uses less digits than its factorization.

75520145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408259.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 75520145 is about 8690.2327356636. The cubic root of 75520145 is about 422.6889926271.

The spelling of 75520145 in words is "seventy-five million, five hundred twenty thousand, one hundred forty-five".