75071345 has 4 divisors (see below), whose sum is σ = 90085620. Its totient is φ = 60057072.

The previous prime is 75071341. The next prime is 75071363. The reversal of 75071345 is 54317057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54317057 = 17 ⋅3195121.

It can be written as a sum of positive squares in 2 ways, for example, as 54893281 + 20178064 = 7409^2 + 4492^2 .

It is a cyclic number.

It is not a de Polignac number, because 75071345 - 2² = 75071341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75071341) 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, 7507130 + ... + 7507139.

It is an arithmetic number, because the mean of its divisors is an integer number (22521405).

Almost surely, 2^75071345 is an apocalyptic number.

It is an amenable number.

75071345 is a deficient number, since it is larger than the sum of its proper divisors (15014275).

75071345 is a wasteful number, since it uses less digits than its factorization.

75071345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15014274.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 75071345 is about 8664.3721642136. The cubic root of 75071345 is about 421.8500118350.

The spelling of 75071345 in words is "seventy-five million, seventy-one thousand, three hundred forty-five".