720442641 has 8 divisors (see below), whose sum is σ = 965620224. Its totient is φ = 477780080.

The previous prime is 720442607. The next prime is 720442661. The reversal of 720442641 is 146244027.

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 720442641 - 2¹¹ = 720440593 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 720442599 and 720442608.

It is not an unprimeable number, because it can be changed into a prime (720442661) 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, 628086 + ... + 629231.

It is an arithmetic number, because the mean of its divisors is an integer number (120702528).

Almost surely, 2^720442641 is an apocalyptic number.

It is an amenable number.

720442641 is a deficient number, since it is larger than the sum of its proper divisors (245177583).

720442641 is a wasteful number, since it uses less digits than its factorization.

720442641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257511.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 720442641 is about 26841.0625907396. The cubic root of 720442641 is about 896.4645833035.

Adding to 720442641 its reverse (146244027), we get a palindrome (866686668).

The spelling of 720442641 in words is "seven hundred twenty million, four hundred forty-two thousand, six hundred forty-one".