421875786 has 8 divisors (see below), whose sum is σ = 843751584. Its totient is φ = 140625260.

The previous prime is 421875749. The next prime is 421875787. The reversal of 421875786 is 687578124.

It is a sphenic number, since it is the product of 3 distinct primes.

421875786 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (421875787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35156310 + ... + 35156321.

It is an arithmetic number, because the mean of its divisors is an integer number (105468948).

Almost surely, 2^421875786 is an apocalyptic number.

421875786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

421875786 is a wasteful number, since it uses less digits than its factorization.

421875786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70312636.

The product of its digits is 752640, while the sum is 48.

The square root of 421875786 is about 20539.6150402095. The cubic root of 421875786 is about 750.0004657775. Note that the first 3 decimals are identical.

The spelling of 421875786 in words is "four hundred twenty-one million, eight hundred seventy-five thousand, seven hundred eighty-six".