421911785 has 4 divisors (see below), whose sum is σ = 506294148. Its totient is φ = 337529424.

The previous prime is 421911769. The next prime is 421911799. The reversal of 421911785 is 587119124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 186841561 + 235070224 = 13669^2 + 15332^2 .

It is a cyclic number.

It is not a de Polignac number, because 421911785 - 2⁴ = 421911769 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, 42191174 + ... + 42191183.

It is an arithmetic number, because the mean of its divisors is an integer number (126573537).

Almost surely, 2^421911785 is an apocalyptic number.

It is an amenable number.

421911785 is a deficient number, since it is larger than the sum of its proper divisors (84382363).

421911785 is an equidigital number, since it uses as much as digits as its factorization.

421911785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84382362.

The product of its digits is 20160, while the sum is 38.

The square root of 421911785 is about 20540.4913524482. The cubic root of 421911785 is about 750.0217978850.

The spelling of 421911785 in words is "four hundred twenty-one million, nine hundred eleven thousand, seven hundred eighty-five".