720051 has 4 divisors (see below), whose sum is σ = 960072. Its totient is φ = 480032.

The previous prime is 720023. The next prime is 720053. The reversal of 720051 is 150027.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 720051 - 2⁵ = 720019 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 720051.

It is not an unprimeable number, because it can be changed into a prime (720053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 120006 + ... + 120011.

It is an arithmetic number, because the mean of its divisors is an integer number (240018).

2⁷²⁰⁰⁵¹ is an apocalyptic number.

720051 is a deficient number, since it is larger than the sum of its proper divisors (240021).

720051 is a wasteful number, since it uses less digits than its factorization.

720051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240020.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 720051 is about 848.5581889299. The cubic root of 720051 is about 89.6302111001.

Adding to 720051 its reverse (150027), we get a palindrome (870078).

The spelling of 720051 in words is "seven hundred twenty thousand, fifty-one".