71750645 has 8 divisors (see below), whose sum is σ = 86548056. Its totient is φ = 57102336.

The previous prime is 71750641. The next prime is 71750663. The reversal of 71750645 is 54605717.

It can be written as a sum of positive squares in 4 ways, for example, as 6754801 + 64995844 = 2599^2 + 8062^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71750645 - 2² = 71750641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71750641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36212 + ... + 38141.

It is an arithmetic number, because the mean of its divisors is an integer number (10818507).

Almost surely, 2^71750645 is an apocalyptic number.

It is an amenable number.

71750645 is a deficient number, since it is larger than the sum of its proper divisors (14797411).

71750645 is a wasteful number, since it uses less digits than its factorization.

71750645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74551.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 71750645 is about 8470.5752461093. The cubic root of 71750645 is about 415.5359505077.

The spelling of 71750645 in words is "seventy-one million, seven hundred fifty thousand, six hundred forty-five".