171420842 has 16 divisors (see below), whose sum is σ = 262241280. Its totient is φ = 84015552.

The previous prime is 171420841. The next prime is 171420857. The reversal of 171420842 is 248024171.

It is not an unprimeable number, because it can be changed into a prime (171420841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43298 + ... + 47090.

It is an arithmetic number, because the mean of its divisors is an integer number (16390080).

Almost surely, 2^171420842 is an apocalyptic number.

171420842 is a deficient number, since it is larger than the sum of its proper divisors (90820438).

171420842 is a wasteful number, since it uses less digits than its factorization.

171420842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 171420842 is about 13092.7782384030. The cubic root of 171420842 is about 555.5048751072.

The spelling of 171420842 in words is "one hundred seventy-one million, four hundred twenty thousand, eight hundred forty-two".