101705521 has 2 divisors, whose sum is σ = 101705522. Its totient is φ = 101705520.

The previous prime is 101705507. The next prime is 101705561. The reversal of 101705521 is 125507101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59598400 + 42107121 = 7720^2 + 6489^2 .

It is a cyclic number.

It is not a de Polignac number, because 101705521 - 2¹⁷ = 101574449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101705492 and 101705501.

It is not a weakly prime, because it can be changed into another prime (101705561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50852760 + 50852761.

It is an arithmetic number, because the mean of its divisors is an integer number (50852761).

Almost surely, 2^101705521 is an apocalyptic number.

It is an amenable number.

101705521 is a deficient number, since it is larger than the sum of its proper divisors (1).

101705521 is an equidigital number, since it uses as much as digits as its factorization.

101705521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 101705521 is about 10084.9155177423. The cubic root of 101705521 is about 466.7827980254.

The spelling of 101705521 in words is "one hundred one million, seven hundred five thousand, five hundred twenty-one".