71545730 has 8 divisors (see below), whose sum is σ = 128782332. Its totient is φ = 28618288.

The previous prime is 71545723. The next prime is 71545769. The reversal of 71545730 is 3754517.

It can be written as a sum of positive squares in 2 ways, for example, as 62837329 + 8708401 = 7927^2 + 2951^2 .

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

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, 3577277 + ... + 3577296.

Almost surely, 2^71545730 is an apocalyptic number.

71545730 is a deficient number, since it is larger than the sum of its proper divisors (57236602).

71545730 is a wasteful number, since it uses less digits than its factorization.

71545730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154580.

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

The square root of 71545730 is about 8458.4709020011. The cubic root of 71545730 is about 415.1399924476.

The spelling of 71545730 in words is "seventy-one million, five hundred forty-five thousand, seven hundred thirty".