71286945 has 16 divisors (see below), whose sum is σ = 114210240. Its totient is φ = 37969344.

The previous prime is 71286937. The next prime is 71286947. The reversal of 71286945 is 54968217.

It is not a de Polignac number, because 71286945 - 2³ = 71286937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71286897 and 71286906.

It is not an unprimeable number, because it can be changed into a prime (71286947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10446 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (7138140).

Almost surely, 2^71286945 is an apocalyptic number.

It is an amenable number.

71286945 is a deficient number, since it is larger than the sum of its proper divisors (42923295).

71286945 is a wasteful number, since it uses less digits than its factorization.

71286945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304.

The product of its digits is 120960, while the sum is 42.

The square root of 71286945 is about 8443.1596573795. The cubic root of 71286945 is about 414.6388593817.

The spelling of 71286945 in words is "seventy-one million, two hundred eighty-six thousand, nine hundred forty-five".