420651385 has 16 divisors (see below), whose sum is σ = 629338752. Its totient is φ = 262224000.

The previous prime is 420651377. The next prime is 420651389. The reversal of 420651385 is 583156024.

It is not a de Polignac number, because 420651385 - 2³ = 420651377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420651385.

It is not an unprimeable number, because it can be changed into a prime (420651389) by changing a digit.

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, 545916 + ... + 546685.

It is an arithmetic number, because the mean of its divisors is an integer number (39333672).

Almost surely, 2^420651385 is an apocalyptic number.

It is an amenable number.

420651385 is a deficient number, since it is larger than the sum of its proper divisors (208687367).

420651385 is a wasteful number, since it uses less digits than its factorization.

420651385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092624.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 420651385 is about 20509.7875415617. The cubic root of 420651385 is about 749.2741926463.

The spelling of 420651385 in words is "four hundred twenty million, six hundred fifty-one thousand, three hundred eighty-five".