720537 has 8 divisors (see below), whose sum is σ = 1011360. Its totient is φ = 455040.

The previous prime is 720527. The next prime is 720547. The reversal of 720537 is 735027.

It is an interprime number because it is at equal distance from previous prime (720527) and next prime (720547).

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

It is not a de Polignac number, because 720537 - 2⁸ = 720281 is a prime.

720537 is a lucky 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 7 ways as a sum of consecutive naturals, for example, 6264 + ... + 6377.

It is an arithmetic number, because the mean of its divisors is an integer number (126420).

2⁷²⁰⁵³⁷ is an apocalyptic number.

It is an amenable number.

720537 is a deficient number, since it is larger than the sum of its proper divisors (290823).

720537 is a wasteful number, since it uses less digits than its factorization.

720537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12663.

The product of its (nonzero) digits is 1470, while the sum is 24.

The square root of 720537 is about 848.8445087294. The cubic root of 720537 is about 89.6503719340.

The spelling of 720537 in words is "seven hundred twenty thousand, five hundred thirty-seven".