100702561 has 2 divisors, whose sum is σ = 100702562. Its totient is φ = 100702560.

The previous prime is 100702531. The next prime is 100702619. The reversal of 100702561 is 165207001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96825600 + 3876961 = 9840^2 + 1969^2 .

It is an emirp because it is prime and its reverse (165207001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100702561 - 2¹³ = 100694369 is a prime.

It is not a weakly prime, because it can be changed into another prime (100702501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50351280 + 50351281.

It is an arithmetic number, because the mean of its divisors is an integer number (50351281).

Almost surely, 2^100702561 is an apocalyptic number.

It is an amenable number.

100702561 is a deficient number, since it is larger than the sum of its proper divisors (1).

100702561 is an equidigital number, since it uses as much as digits as its factorization.

100702561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 100702561 is about 10035.0665667947. The cubic root of 100702561 is about 465.2433474028.

Adding to 100702561 its reverse (165207001), we get a palindrome (265909562).

The spelling of 100702561 in words is "one hundred million, seven hundred two thousand, five hundred sixty-one".