71145307 has 4 divisors (see below), whose sum is σ = 71163360. Its totient is φ = 71127256.

The previous prime is 71145247. The next prime is 71145317. The reversal of 71145307 is 70354117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70354117 = 233 ⋅301949.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71145307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71145317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307 + ... + 11932.

It is an arithmetic number, because the mean of its divisors is an integer number (17790840).

Almost surely, 2^71145307 is an apocalyptic number.

71145307 is a deficient number, since it is larger than the sum of its proper divisors (18053).

71145307 is a wasteful number, since it uses less digits than its factorization.

71145307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18052.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 71145307 is about 8434.7677502110. The cubic root of 71145307 is about 414.3640659294.

It can be divided in two parts, 7114 and 5307, that added together give a palindrome (12421).

The spelling of 71145307 in words is "seventy-one million, one hundred forty-five thousand, three hundred seven".