720225 has 48 divisors (see below), whose sum is σ = 1458240. Its totient is φ = 345600.

The previous prime is 720221. The next prime is 720229. The reversal of 720225 is 522027.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (720221) and next prime (720229).

It is not a de Polignac number, because 720225 - 2² = 720221 is a prime.

720225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 720198 and 720207.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720225.

It is not an unprimeable number, because it can be changed into a prime (720221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7377 + ... + 7473.

It is an arithmetic number, because the mean of its divisors is an integer number (30380).

2⁷²⁰²²⁵ is an apocalyptic number.

720225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

720225 is an abundant number, since it is smaller than the sum of its proper divisors (738015).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720225 is a wasteful number, since it uses less digits than its factorization.

720225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 720225 is about 848.6607095889. The cubic root of 720225 is about 89.6374302187.

It can be divided in two parts, 72022 and 5, that added together give a palindrome (72027).

The spelling of 720225 in words is "seven hundred twenty thousand, two hundred twenty-five".