71407085 has 4 divisors (see below), whose sum is σ = 85688508. Its totient is φ = 57125664.

The previous prime is 71407081. The next prime is 71407087. The reversal of 71407085 is 58070417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56761156 + 14645929 = 7534^2 + 3827^2 .

It is a cyclic number.

It is not a de Polignac number, because 71407085 - 2² = 71407081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71407081) 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, 7140704 + ... + 7140713.

It is an arithmetic number, because the mean of its divisors is an integer number (21422127).

Almost surely, 2^71407085 is an apocalyptic number.

It is an amenable number.

71407085 is a deficient number, since it is larger than the sum of its proper divisors (14281423).

71407085 is a wasteful number, since it uses less digits than its factorization.

71407085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14281422.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 71407085 is about 8450.2712974200. The cubic root of 71407085 is about 414.8716591576.

The spelling of 71407085 in words is "seventy-one million, four hundred seven thousand, eighty-five".