720102001 has 2 divisors, whose sum is σ = 720102002. Its totient is φ = 720102000.

The previous prime is 720101989. The next prime is 720102049. The reversal of 720102001 is 100201027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608904976 + 111197025 = 24676^2 + 10545^2 .

It is a cyclic number.

It is not a de Polignac number, because 720102001 - 2⁵ = 720101969 is a prime.

It is not a weakly prime, because it can be changed into another prime (720102401) 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 as a sum of consecutive naturals, namely, 360051000 + 360051001.

It is an arithmetic number, because the mean of its divisors is an integer number (360051001).

Almost surely, 2^720102001 is an apocalyptic number.

It is an amenable number.

720102001 is a deficient number, since it is larger than the sum of its proper divisors (1).

720102001 is an equidigital number, since it uses as much as digits as its factorization.

720102001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 720102001 is about 26834.7163391007. The cubic root of 720102001 is about 896.3232721060.

Adding to 720102001 its reverse (100201027), we get a palindrome (820303028).

The spelling of 720102001 in words is "seven hundred twenty million, one hundred two thousand, one".