720526 has 8 divisors (see below), whose sum is σ = 1085184. Its totient is φ = 358800.

The previous prime is 720497. The next prime is 720527. The reversal of 720526 is 625027.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 720497 and 720506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720527) 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, 51 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (135648).

2⁷²⁰⁵²⁶ is an apocalyptic number.

720526 is a deficient number, since it is larger than the sum of its proper divisors (364658).

720526 is a wasteful number, since it uses less digits than its factorization.

720526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 720526 is about 848.8380293083. The cubic root of 720526 is about 89.6499157191.

The spelling of 720526 in words is "seven hundred twenty thousand, five hundred twenty-six".