71057045 has 8 divisors (see below), whose sum is σ = 85485624. Its totient is φ = 56700864.

The previous prime is 71057033. The next prime is 71057069. The reversal of 71057045 is 54075017.

It can be written as a sum of positive squares in 4 ways, for example, as 1684804 + 69372241 = 1298^2 + 8329^2 .

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 71057045 - 2⁶ = 71056981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71056999 and 71057017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15914 + ... + 19883.

It is an arithmetic number, because the mean of its divisors is an integer number (10685703).

Almost surely, 2^71057045 is an apocalyptic number.

It is an amenable number.

71057045 is a deficient number, since it is larger than the sum of its proper divisors (14428579).

71057045 is a wasteful number, since it uses less digits than its factorization.

71057045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36199.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 71057045 is about 8429.5340915142. The cubic root of 71057045 is about 414.1926433530.

The spelling of 71057045 in words is "seventy-one million, fifty-seven thousand, forty-five".