170421259 has 2 divisors, whose sum is σ = 170421260. Its totient is φ = 170421258.

The previous prime is 170421257. The next prime is 170421263. The reversal of 170421259 is 952124071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170421259 - 2¹ = 170421257 is a prime.

Together with 170421257, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 170421259.

It is not a weakly prime, because it can be changed into another prime (170421253) 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, 85210629 + 85210630.

It is an arithmetic number, because the mean of its divisors is an integer number (85210630).

Almost surely, 2^170421259 is an apocalyptic number.

170421259 is a deficient number, since it is larger than the sum of its proper divisors (1).

170421259 is an equidigital number, since it uses as much as digits as its factorization.

170421259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 170421259 is about 13054.5493602805. The cubic root of 170421259 is about 554.4230229249.

The spelling of 170421259 in words is "one hundred seventy million, four hundred twenty-one thousand, two hundred fifty-nine".