71345505 has 64 divisors (see below), whose sum is σ = 143474688. Its totient is φ = 29410560.

The previous prime is 71345501. The next prime is 71345531. The reversal of 71345505 is 50554317.

It is not a de Polignac number, because 71345505 - 2² = 71345501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71345501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 257427 + ... + 257703.

It is an arithmetic number, because the mean of its divisors is an integer number (2241792).

Almost surely, 2^71345505 is an apocalyptic number.

It is an amenable number.

71345505 is an abundant number, since it is smaller than the sum of its proper divisors (72129183).

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

71345505 is a wasteful number, since it uses less digits than its factorization.

71345505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 71345505 is about 8446.6268415267. The cubic root of 71345505 is about 414.7523659331.

The spelling of 71345505 in words is "seventy-one million, three hundred forty-five thousand, five hundred five".