71321760 has 72 divisors (see below), whose sum is σ = 243390420. Its totient is φ = 19018752.

The previous prime is 71321743. The next prime is 71321777. The reversal of 71321760 is 6712317.

It is an interprime number because it is at equal distance from previous prime (71321743) and next prime (71321777).

It can be written as a sum of positive squares in 2 ways, for example, as 62536464 + 8785296 = 7908^2 + 2964^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23325 + ... + 26204.

Almost surely, 2^71321760 is an apocalyptic number.

It is an amenable number.

71321760 is an abundant number, since it is smaller than the sum of its proper divisors (172068660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71321760 is a wasteful number, since it uses less digits than its factorization.

71321760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49550 (or 49539 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 71321760 is about 8445.2211338721. The cubic root of 71321760 is about 414.7063486090.

The spelling of 71321760 in words is "seventy-one million, three hundred twenty-one thousand, seven hundred sixty".