506421685 has 32 divisors (see below), whose sum is σ = 760032000. Its totient is φ = 314703360.

The previous prime is 506421677. The next prime is 506421737. The reversal of 506421685 is 586124605.

It is not a de Polignac number, because 506421685 - 2³ = 506421677 is a prime.

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, 132481 + ... + 136249.

It is an arithmetic number, because the mean of its divisors is an integer number (23751000).

Almost surely, 2^506421685 is an apocalyptic number.

506421685 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

506421685 is a deficient number, since it is larger than the sum of its proper divisors (253610315).

506421685 is a wasteful number, since it uses less digits than its factorization.

506421685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 506421685 is about 22503.8148988122. The cubic root of 506421685 is about 797.0840117839.

The spelling of 506421685 in words is "five hundred six million, four hundred twenty-one thousand, six hundred eighty-five".