320715 has 12 divisors (see below), whose sum is σ = 555984. Its totient is φ = 171024.

The previous prime is 320713. The next prime is 320741. The reversal of 320715 is 517023.

It is not a de Polignac number, because 320715 - 2¹ = 320713 is a prime.

It is a super-2 number, since 2×320715² = 205716222450, which contains 22 as substring.

It is an Ulam number.

320715 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320715.

It is not an unprimeable number, because it can be changed into a prime (320713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3519 + ... + 3608.

It is an arithmetic number, because the mean of its divisors is an integer number (46332).

2³²⁰⁷¹⁵ is an apocalyptic number.

320715 is a deficient number, since it is larger than the sum of its proper divisors (235269).

320715 is a wasteful number, since it uses less digits than its factorization.

320715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138 (or 7135 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 320715 is about 566.3170490105. The cubic root of 320715 is about 68.4499430056.

Adding to 320715 its reverse (517023), we get a palindrome (837738).

It can be divided in two parts, 320 and 715, that added together give a triangular number (1035 = T₄₅).

The spelling of 320715 in words is "three hundred twenty thousand, seven hundred fifteen".