71057061 has 8 divisors (see below), whose sum is σ = 105269760. Its totient is φ = 47371356.

The previous prime is 71057033. The next prime is 71057069. The reversal of 71057061 is 16075017.

It is not a de Polignac number, because 71057061 - 2¹⁹ = 70532773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2631743 = 71057061 / (7 + 1 + 0 + 5 + 7 + 0 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71057069) 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, 1315845 + ... + 1315898.

It is an arithmetic number, because the mean of its divisors is an integer number (13158720).

Almost surely, 2^71057061 is an apocalyptic number.

It is an amenable number.

71057061 is a deficient number, since it is larger than the sum of its proper divisors (34212699).

71057061 is a wasteful number, since it uses less digits than its factorization.

71057061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631752 (or 2631746 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 71057061 is about 8429.5350405583. The cubic root of 71057061 is about 414.1926744411.

The spelling of 71057061 in words is "seventy-one million, fifty-seven thousand, sixty-one".