70517 has 4 divisors (see below), whose sum is σ = 71136. Its totient is φ = 69900.

The previous prime is 70507. The next prime is 70529. The reversal of 70517 is 71507.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71507 = 23 ⋅3109.

It is a cyclic number.

It is not a de Polignac number, because 70517 - 2⁴ = 70501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70517.

It is not an unprimeable number, because it can be changed into a prime (70507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 384.

It is an arithmetic number, because the mean of its divisors is an integer number (17784).

2⁷⁰⁵¹⁷ is an apocalyptic number.

It is an amenable number.

70517 is a deficient number, since it is larger than the sum of its proper divisors (619).

70517 is a wasteful number, since it uses less digits than its factorization.

70517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 245, while the sum is 20.

The square root of 70517 is about 265.5503718694. The cubic root of 70517 is about 41.3140663470.

Subtracting 70517 from its reverse (71507), we obtain a triangular number (990 = T₄₄).

The spelling of 70517 in words is "seventy thousand, five hundred seventeen".