71371305 has 24 divisors (see below), whose sum is σ = 124088328. Its totient is φ = 37948416.

The previous prime is 71371249. The next prime is 71371309. The reversal of 71371305 is 50317317.

It can be written as a sum of positive squares in 4 ways, for example, as 25280784 + 46090521 = 5028^2 + 6789^2 .

It is not a de Polignac number, because 71371305 - 2⁶ = 71371241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71371309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13639 + ... + 18131.

It is an arithmetic number, because the mean of its divisors is an integer number (5170347).

Almost surely, 2^71371305 is an apocalyptic number.

It is an amenable number.

71371305 is a deficient number, since it is larger than the sum of its proper divisors (52717023).

71371305 is a wasteful number, since it uses less digits than its factorization.

71371305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857 (or 4854 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 71371305 is about 8448.1539403588. The cubic root of 71371305 is about 414.8023542328.

The spelling of 71371305 in words is "seventy-one million, three hundred seventy-one thousand, three hundred five".