75775145 has 4 divisors (see below), whose sum is σ = 90930180. Its totient is φ = 60620112.

The previous prime is 75775121. The next prime is 75775151. The reversal of 75775145 is 54157757.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54157757 = 1543 ⋅35099.

It can be written as a sum of positive squares in 2 ways, for example, as 36675136 + 39100009 = 6056^2 + 6253^2 .

It is a cyclic number.

It is not a de Polignac number, because 75775145 - 2¹² = 75771049 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7577510 + ... + 7577519.

It is an arithmetic number, because the mean of its divisors is an integer number (22732545).

Almost surely, 2^75775145 is an apocalyptic number.

It is an amenable number.

75775145 is a deficient number, since it is larger than the sum of its proper divisors (15155035).

75775145 is a wasteful number, since it uses less digits than its factorization.

75775145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15155034.

The product of its digits is 171500, while the sum is 41.

The square root of 75775145 is about 8704.8920154129. The cubic root of 75775145 is about 423.1642062469.

The spelling of 75775145 in words is "seventy-five million, seven hundred seventy-five thousand, one hundred forty-five".