420171715 has 4 divisors (see below), whose sum is σ = 504206064. Its totient is φ = 336137368.

The previous prime is 420171709. The next prime is 420171727. The reversal of 420171715 is 517171024.

420171715 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420171715 - 2³ = 420171707 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, 42017167 + ... + 42017176.

It is an arithmetic number, because the mean of its divisors is an integer number (126051516).

Almost surely, 2^420171715 is an apocalyptic number.

420171715 is a deficient number, since it is larger than the sum of its proper divisors (84034349).

420171715 is an equidigital number, since it uses as much as digits as its factorization.

420171715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84034348.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 420171715 is about 20498.0905208266. The cubic root of 420171715 is about 748.9892844766.

The spelling of 420171715 in words is "four hundred twenty million, one hundred seventy-one thousand, seven hundred fifteen".