171420630 has 64 divisors (see below), whose sum is σ = 424681920. Its totient is φ = 44250624.

The previous prime is 171420629. The next prime is 171420643. The reversal of 171420630 is 36024171.

It is a self number, because there is not a number n which added to its sum of digits gives 171420630.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431592 + ... + 431988.

It is an arithmetic number, because the mean of its divisors is an integer number (6635655).

Almost surely, 2^171420630 is an apocalyptic number.

171420630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 171420630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212340960).

171420630 is an abundant number, since it is smaller than the sum of its proper divisors (253261290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171420630 is a wasteful number, since it uses less digits than its factorization.

171420630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 171420630 is about 13092.7701423343. The cubic root of 171420630 is about 555.5046461053.

The spelling of 171420630 in words is "one hundred seventy-one million, four hundred twenty thousand, six hundred thirty".