75121173 has 6 divisors (see below), whose sum is σ = 108508374. Its totient is φ = 50080776.

The previous prime is 75121171. The next prime is 75121187. The reversal of 75121173 is 37112157.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64112049 + 11009124 = 8007^2 + 3318^2 .

It is not a de Polignac number, because 75121173 - 2¹ = 75121171 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75121171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4173390 + ... + 4173407.

It is an arithmetic number, because the mean of its divisors is an integer number (18084729).

Almost surely, 2^75121173 is an apocalyptic number.

It is an amenable number.

75121173 is a deficient number, since it is larger than the sum of its proper divisors (33387201).

75121173 is a wasteful number, since it uses less digits than its factorization.

75121173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346803 (or 8346800 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 75121173 is about 8667.2471408170. The cubic root of 75121173 is about 421.9433243743.

The spelling of 75121173 in words is "seventy-five million, one hundred twenty-one thousand, one hundred seventy-three".