71071345 has 8 divisors (see below), whose sum is σ = 85559976. Its totient is φ = 56674176.

The previous prime is 71071333. The next prime is 71071349. The reversal of 71071345 is 54317017.

It can be written as a sum of positive squares in 4 ways, for example, as 9480241 + 61591104 = 3079^2 + 7848^2 .

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 71071345 - 2¹⁷ = 70940273 is a prime.

It is a super-2 number, since 2×71071345² = 10102272160218050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71071349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21142 + ... + 24271.

It is an arithmetic number, because the mean of its divisors is an integer number (10694997).

Almost surely, 2^71071345 is an apocalyptic number.

It is an amenable number.

71071345 is a deficient number, since it is larger than the sum of its proper divisors (14488631).

71071345 is a wasteful number, since it uses less digits than its factorization.

71071345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45731.

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

The square root of 71071345 is about 8430.3822570510. The cubic root of 71071345 is about 414.2204264650.

The spelling of 71071345 in words is "seventy-one million, seventy-one thousand, three hundred forty-five".