720055 has 12 divisors (see below), whose sum is σ = 1005480. Its totient is φ = 493584.

The previous prime is 720053. The next prime is 720059. The reversal of 720055 is 550027.

It is a happy number.

It is not a de Polignac number, because 720055 - 2¹ = 720053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720053) 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, 1225 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2⁷²⁰⁰⁵⁵ is an apocalyptic number.

720055 is a deficient number, since it is larger than the sum of its proper divisors (285425).

720055 is a wasteful number, since it uses less digits than its factorization.

720055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958 (or 2951 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 720055 is about 848.5605458658. The cubic root of 720055 is about 89.6303770699.

It can be divided in two parts, 72005 and 5, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 720055 in words is "seven hundred twenty thousand, fifty-five".