75102161 has 4 divisors (see below), whose sum is σ = 75241524. Its totient is φ = 74962800.

The previous prime is 75102143. The next prime is 75102187. The reversal of 75102161 is 16120157.

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 18190225 + 56911936 = 4265^2 + 7544^2 .

It is a cyclic number.

It is not a de Polignac number, because 75102161 - 2²² = 70907857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68870 + ... + 69951.

It is an arithmetic number, because the mean of its divisors is an integer number (18810381).

Almost surely, 2^75102161 is an apocalyptic number.

It is an amenable number.

75102161 is a deficient number, since it is larger than the sum of its proper divisors (139363).

75102161 is a wasteful number, since it uses less digits than its factorization.

75102161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139362.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 75102161 is about 8666.1502987197. The cubic root of 75102161 is about 421.9077256077.

The spelling of 75102161 in words is "seventy-five million, one hundred two thousand, one hundred sixty-one".