170409121 has 2 divisors, whose sum is σ = 170409122. Its totient is φ = 170409120.

The previous prime is 170409103. The next prime is 170409143. The reversal of 170409121 is 121904071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130782096 + 39627025 = 11436^2 + 6295^2 .

It is a cyclic number.

It is not a de Polignac number, because 170409121 - 2¹¹ = 170407073 is a prime.

It is not a weakly prime, because it can be changed into another prime (170409181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85204560 + 85204561.

It is an arithmetic number, because the mean of its divisors is an integer number (85204561).

Almost surely, 2^170409121 is an apocalyptic number.

It is an amenable number.

170409121 is a deficient number, since it is larger than the sum of its proper divisors (1).

170409121 is an equidigital number, since it uses as much as digits as its factorization.

170409121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 170409121 is about 13054.0844565982. The cubic root of 170409121 is about 554.4098599614.

The spelling of 170409121 in words is "one hundred seventy million, four hundred nine thousand, one hundred twenty-one".