71321506 has 8 divisors (see below), whose sum is σ = 107151084. Its totient is φ = 35604480.

The previous prime is 71321491. The next prime is 71321519. The reversal of 71321506 is 60512317.

It can be written as a sum of positive squares in 2 ways, for example, as 71318025 + 3481 = 8445^2 + 59^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26535 + ... + 29098.

Almost surely, 2^71321506 is an apocalyptic number.

71321506 is a deficient number, since it is larger than the sum of its proper divisors (35829578).

71321506 is a wasteful number, since it uses less digits than its factorization.

71321506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56276.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 71321506 is about 8445.2060957682. The cubic root of 71321506 is about 414.7058563070.

The spelling of 71321506 in words is "seventy-one million, three hundred twenty-one thousand, five hundred six".