420246185 has 16 divisors (see below), whose sum is σ = 518655312. Its totient is φ = 326649600.

The previous prime is 420246173. The next prime is 420246241. The reversal of 420246185 is 581642024.

It can be written as a sum of positive squares in 8 ways, for example, as 104366656 + 315879529 = 10216^2 + 17773^2 .

It is not a de Polignac number, because 420246185 - 2⁸ = 420245929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195215 + ... + 197355.

It is an arithmetic number, because the mean of its divisors is an integer number (32415957).

Almost surely, 2^420246185 is an apocalyptic number.

It is an amenable number.

420246185 is a deficient number, since it is larger than the sum of its proper divisors (98409127).

420246185 is a wasteful number, since it uses less digits than its factorization.

420246185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 420246185 is about 20499.9069510083. The cubic root of 420246185 is about 749.0335314159.

The spelling of 420246185 in words is "four hundred twenty million, two hundred forty-six thousand, one hundred eighty-five".