720100625 has 10 divisors (see below), whose sum is σ = 899838522. Its totient is φ = 576080000.

The previous prime is 720100621. The next prime is 720100663. The reversal of 720100625 is 526001027.

It can be written as a sum of positive squares in 5 ways, for example, as 131698576 + 588402049 = 11476^2 + 24257^2 .

It is not a de Polignac number, because 720100625 - 2² = 720100621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 720100625.

It is not an unprimeable number, because it can be changed into a prime (720100621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 575456 + ... + 576705.

Almost surely, 2^720100625 is an apocalyptic number.

It is an amenable number.

720100625 is a deficient number, since it is larger than the sum of its proper divisors (179737897).

720100625 is an equidigital number, since it uses as much as digits as its factorization.

720100625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152181 (or 1152166 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 720100625 is about 26834.6907006584. The cubic root of 720100625 is about 896.3227011954.

The spelling of 720100625 in words is "seven hundred twenty million, one hundred thousand, six hundred twenty-five".