725318 has 8 divisors (see below), whose sum is σ = 1186920. Its totient is φ = 329680.

The previous prime is 725317. The next prime is 725321. The reversal of 725318 is 813527.

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

It is a super-2 number, since 2×725318² = 1052172402248, which contains 22 as substring.

It is a Curzon 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 725318.

It is not an unprimeable number, because it can be changed into a prime (725317) 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, 16463 + ... + 16506.

It is an arithmetic number, because the mean of its divisors is an integer number (148365).

2⁷²⁵³¹⁸ is an apocalyptic number.

725318 is a deficient number, since it is larger than the sum of its proper divisors (461602).

725318 is a wasteful number, since it uses less digits than its factorization.

725318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32982.

The product of its digits is 1680, while the sum is 26.

The square root of 725318 is about 851.6560338540. The cubic root of 725318 is about 89.8482215468.

Subtracting 725318 from its reverse (813527), we obtain a square (88209 = 297²).

The spelling of 725318 in words is "seven hundred twenty-five thousand, three hundred eighteen".