725216 has 24 divisors (see below), whose sum is σ = 1446984. Its totient is φ = 357760.

The previous prime is 725209. The next prime is 725273. The reversal of 725216 is 612527.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 725191 and 725200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4106 + ... + 4278.

It is an arithmetic number, because the mean of its divisors is an integer number (60291).

2⁷²⁵²¹⁶ is an apocalyptic number.

It is an amenable number.

725216 is a deficient number, since it is larger than the sum of its proper divisors (721768).

725216 is a wasteful number, since it uses less digits than its factorization.

725216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 306 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 725216 is about 851.5961484178. The cubic root of 725216 is about 89.8440096250.

It can be divided in two parts, 72521 and 6, that added together give a palindrome (72527).

The spelling of 725216 in words is "seven hundred twenty-five thousand, two hundred sixteen".