71320345 has 8 divisors (see below), whose sum is σ = 85810176. Its totient is φ = 56905776.

The previous prime is 71320339. The next prime is 71320363. The reversal of 71320345 is 54302317.

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 71320345 - 2⁵ = 71320313 is a prime.

It is a super-2 number, since 2×71320345² = 10173183221838050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16707 + ... + 20536.

It is an arithmetic number, because the mean of its divisors is an integer number (10726272).

Almost surely, 2^71320345 is an apocalyptic number.

It is an amenable number.

71320345 is a deficient number, since it is larger than the sum of its proper divisors (14489831).

71320345 is a wasteful number, since it uses less digits than its factorization.

71320345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37631.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 71320345 is about 8445.1373582672. The cubic root of 71320345 is about 414.7036060455.

The spelling of 71320345 in words is "seventy-one million, three hundred twenty thousand, three hundred forty-five".