421986205 has 4 divisors (see below), whose sum is σ = 506383452. Its totient is φ = 337588960.

The previous prime is 421986179. The next prime is 421986241. The reversal of 421986205 is 502689124.

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 126765081 + 295221124 = 11259^2 + 17182^2 .

It is not a de Polignac number, because 421986205 - 2⁷ = 421986077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42198616 + ... + 42198625.

It is an arithmetic number, because the mean of its divisors is an integer number (126595863).

Almost surely, 2^421986205 is an apocalyptic number.

It is an amenable number.

421986205 is a deficient number, since it is larger than the sum of its proper divisors (84397247).

421986205 is an equidigital number, since it uses as much as digits as its factorization.

421986205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84397246.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 421986205 is about 20542.3028163836. The cubic root of 421986205 is about 750.0658934698.

The spelling of 421986205 in words is "four hundred twenty-one million, nine hundred eighty-six thousand, two hundred five".