171420843 has 16 divisors (see below), whose sum is σ = 264007296. Its totient is φ = 97779840.

The previous prime is 171420841. The next prime is 171420857. The reversal of 171420843 is 348024171.

It is not a de Polignac number, because 171420843 - 2¹ = 171420841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171420843.

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 15 ways as a sum of consecutive naturals, for example, 152221 + ... + 153342.

It is an arithmetic number, because the mean of its divisors is an integer number (16500456).

Almost surely, 2^171420843 is an apocalyptic number.

171420843 is a deficient number, since it is larger than the sum of its proper divisors (92586453).

171420843 is a wasteful number, since it uses less digits than its factorization.

171420843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305594.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 171420843 is about 13092.7782765920. The cubic root of 171420843 is about 555.5048761874.

The spelling of 171420843 in words is "one hundred seventy-one million, four hundred twenty thousand, eight hundred forty-three".