71044045 has 4 divisors (see below), whose sum is σ = 85252860. Its totient is φ = 56835232.

The previous prime is 71044031. The next prime is 71044049. The reversal of 71044045 is 54044017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54044017 = 73 ⋅740329.

It can be written as a sum of positive squares in 2 ways, for example, as 14523721 + 56520324 = 3811^2 + 7518^2 .

It is a cyclic number.

It is not a de Polignac number, because 71044045 - 2⁵ = 71044013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71044049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7104400 + ... + 7104409.

It is an arithmetic number, because the mean of its divisors is an integer number (21313215).

Almost surely, 2^71044045 is an apocalyptic number.

It is an amenable number.

71044045 is a deficient number, since it is larger than the sum of its proper divisors (14208815).

71044045 is a wasteful number, since it uses less digits than its factorization.

71044045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14208814.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 71044045 is about 8428.7629578723. The cubic root of 71044045 is about 414.1673827437.

The spelling of 71044045 in words is "seventy-one million, forty-four thousand, forty-five".