71057761 has 2 divisors, whose sum is σ = 71057762. Its totient is φ = 71057760.

The previous prime is 71057759. The next prime is 71057803. The reversal of 71057761 is 16775017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66830625 + 4227136 = 8175^2 + 2056^2 .

It is a cyclic number.

It is not a de Polignac number, because 71057761 - 2¹ = 71057759 is a prime.

Together with 71057759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71067761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528880 + 35528881.

It is an arithmetic number, because the mean of its divisors is an integer number (35528881).

Almost surely, 2^71057761 is an apocalyptic number.

It is an amenable number.

71057761 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057761 is an equidigital number, since it uses as much as digits as its factorization.

71057761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290, while the sum is 34.

The square root of 71057761 is about 8429.5765611328. The cubic root of 71057761 is about 414.1940345402.

The spelling of 71057761 in words is "seventy-one million, fifty-seven thousand, seven hundred sixty-one".