71022945 has 16 divisors (see below), whose sum is σ = 129870720. Its totient is φ = 32467584.

The previous prime is 71022937. The next prime is 71022949. The reversal of 71022945 is 54922017.

It is not a de Polignac number, because 71022945 - 2³ = 71022937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71022949) 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, 338100 + ... + 338309.

It is an arithmetic number, because the mean of its divisors is an integer number (8116920).

Almost surely, 2^71022945 is an apocalyptic number.

It is an amenable number.

71022945 is a deficient number, since it is larger than the sum of its proper divisors (58847775).

71022945 is a wasteful number, since it uses less digits than its factorization.

71022945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676424.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 71022945 is about 8427.5111984500. The cubic root of 71022945 is about 414.1263762710.

The spelling of 71022945 in words is "seventy-one million, twenty-two thousand, nine hundred forty-five".