720455 has 8 divisors (see below), whose sum is σ = 874800. Its totient is φ = 569536.

The previous prime is 720439. The next prime is 720481. The reversal of 720455 is 554027.

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

It is a cyclic number.

It is not a de Polignac number, because 720455 - 2⁴ = 720439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365 + ... + 1254.

It is an arithmetic number, because the mean of its divisors is an integer number (109350).

2⁷²⁰⁴⁵⁵ is an apocalyptic number.

720455 is a deficient number, since it is larger than the sum of its proper divisors (154345).

720455 is a wasteful number, since it uses less digits than its factorization.

720455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 720455 is about 848.7962064006. The cubic root of 720455 is about 89.6469709477.

The spelling of 720455 in words is "seven hundred twenty thousand, four hundred fifty-five".