75129085 has 4 divisors (see below), whose sum is σ = 90154908. Its totient is φ = 60103264.

The previous prime is 75129073. The next prime is 75129091. The reversal of 75129085 is 58092157.

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 32239684 + 42889401 = 5678^2 + 6549^2 .

It is a cyclic number.

It is not a de Polignac number, because 75129085 - 2¹¹ = 75127037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7512904 + ... + 7512913.

It is an arithmetic number, because the mean of its divisors is an integer number (22538727).

Almost surely, 2^75129085 is an apocalyptic number.

It is an amenable number.

75129085 is a deficient number, since it is larger than the sum of its proper divisors (15025823).

75129085 is a wasteful number, since it uses less digits than its factorization.

75129085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15025822.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 75129085 is about 8667.7035597671. The cubic root of 75129085 is about 421.9581373236.

The spelling of 75129085 in words is "seventy-five million, one hundred twenty-nine thousand, eighty-five".