170042149 has 2 divisors, whose sum is σ = 170042150. Its totient is φ = 170042148.

The previous prime is 170042141. The next prime is 170042203. The reversal of 170042149 is 941240071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118417924 + 51624225 = 10882^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 170042149 - 2³ = 170042141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170042141) 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, 85021074 + 85021075.

It is an arithmetic number, because the mean of its divisors is an integer number (85021075).

Almost surely, 2^170042149 is an apocalyptic number.

It is an amenable number.

170042149 is a deficient number, since it is larger than the sum of its proper divisors (1).

170042149 is an equidigital number, since it uses as much as digits as its factorization.

170042149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 170042149 is about 13040.0210505965. The cubic root of 170042149 is about 554.0116044522.

The spelling of 170042149 in words is "one hundred seventy million, forty-two thousand, one hundred forty-nine".