720087 has 8 divisors (see below), whose sum is σ = 980736. Its totient is φ = 469752.

The previous prime is 720059. The next prime is 720089. The reversal of 720087 is 780027.

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

It is not a de Polignac number, because 720087 - 2⁶ = 720023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2413 + ... + 2694.

It is an arithmetic number, because the mean of its divisors is an integer number (122592).

2⁷²⁰⁰⁸⁷ is an apocalyptic number.

720087 is a deficient number, since it is larger than the sum of its proper divisors (260649).

720087 is a wasteful number, since it uses less digits than its factorization.

720087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 720087 is about 848.5794011169. The cubic root of 720087 is about 89.6317048062.

The spelling of 720087 in words is "seven hundred twenty thousand, eighty-seven".