70815 has 8 divisors (see below), whose sum is σ = 113328. Its totient is φ = 37760.

The previous prime is 70793. The next prime is 70823. The reversal of 70815 is 51807.

70815 = 117² + 118² + ... + 121².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70815 - 2⁵ = 70783 is a prime.

70815 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 70791 and 70800.

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 70815.

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, 2346 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (14166).

2⁷⁰⁸¹⁵ is an apocalyptic number.

70815 is a deficient number, since it is larger than the sum of its proper divisors (42513).

70815 is a wasteful number, since it uses less digits than its factorization.

70815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 70815 is about 266.1108791463. The cubic root of 70815 is about 41.3721813629.

The spelling of 70815 in words is "seventy thousand, eight hundred fifteen".