171421234385 has 4 divisors (see below), whose sum is σ = 205705481268. Its totient is φ = 137136987504.

The previous prime is 171421234379. The next prime is 171421234417. The reversal of 171421234385 is 583432124171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583432124171 = 13 ⋅44879394167.

It can be written as a sum of positive squares in 2 ways, for example, as 23094576961 + 148326657424 = 151969^2 + 385132^2 .

It is a cyclic number.

It is not a de Polignac number, because 171421234385 - 2⁸ = 171421234129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17142123434 + ... + 17142123443.

It is an arithmetic number, because the mean of its divisors is an integer number (51426370317).

Almost surely, 2^171421234385 is an apocalyptic number.

It is an amenable number.

171421234385 is a deficient number, since it is larger than the sum of its proper divisors (34284246883).

171421234385 is an equidigital number, since it uses as much as digits as its factorization.

171421234385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34284246882.

The product of its digits is 161280, while the sum is 41.

The spelling of 171421234385 in words is "one hundred seventy-one billion, four hundred twenty-one million, two hundred thirty-four thousand, three hundred eighty-five".