718225 has 6 divisors (see below), whose sum is σ = 890630. Its totient is φ = 574560.

The previous prime is 718187. The next prime is 718241. The reversal of 718225 is 522817.

It can be written as a sum of positive squares in 3 ways, for example, as 24336 + 693889 = 156^2 + 833^2 .

It is not a de Polignac number, because 718225 - 2¹⁹ = 193937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 28729 = 718225 / (7 + 1 + 8 + 2 + 2 + 5).

718225 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 718225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14340 + ... + 14389.

2⁷¹⁸²²⁵ is an apocalyptic number.

It is an amenable number.

718225 is a deficient number, since it is larger than the sum of its proper divisors (172405).

718225 is a wasteful number, since it uses less digits than its factorization.

718225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28739 (or 28734 counting only the distinct ones).

The product of its digits is 1120, while the sum is 25.

The square root of 718225 is about 847.4815632213. The cubic root of 718225 is about 89.5543816064.

The spelling of 718225 in words is "seven hundred eighteen thousand, two hundred twenty-five".