170420253 has 16 divisors (see below), whose sum is σ = 239478720. Its totient is φ = 107502336.

The previous prime is 170420233. The next prime is 170420267. The reversal of 170420253 is 352024071.

It is not a de Polignac number, because 170420253 - 2¹² = 170416157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170420213) 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 in 15 ways as a sum of consecutive naturals, for example, 69301 + ... + 71717.

It is an arithmetic number, because the mean of its divisors is an integer number (14967420).

Almost surely, 2^170420253 is an apocalyptic number.

It is an amenable number.

170420253 is a deficient number, since it is larger than the sum of its proper divisors (69058467).

170420253 is a wasteful number, since it uses less digits than its factorization.

170420253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 170420253 is about 13054.5108295945. The cubic root of 170420253 is about 554.4219319995.

The spelling of 170420253 in words is "one hundred seventy million, four hundred twenty thousand, two hundred fifty-three".