71745530 has 16 divisors (see below), whose sum is σ = 130087080. Its totient is φ = 28488192.

The previous prime is 71745511. The next prime is 71745551. The reversal of 71745530 is 3554717.

It can be written as a sum of positive squares in 4 ways, for example, as 65237929 + 6507601 = 8077^2 + 2551^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24815 + ... + 27554.

Almost surely, 2^71745530 is an apocalyptic number.

71745530 is a deficient number, since it is larger than the sum of its proper divisors (58341550).

71745530 is a wasteful number, since it uses less digits than its factorization.

71745530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52513.

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

The square root of 71745530 is about 8470.2733131818. The cubic root of 71745530 is about 415.5260759535.

The spelling of 71745530 in words is "seventy-one million, seven hundred forty-five thousand, five hundred thirty".