421719205 has 8 divisors (see below), whose sum is σ = 507340152. Its totient is φ = 336523968.

The previous prime is 421719161. The next prime is 421719211. The reversal of 421719205 is 502917124.

It can be written as a sum of positive squares in 4 ways, for example, as 80245764 + 341473441 = 8958^2 + 18479^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 421719205 - 2¹³ = 421711013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104242 + ... + 108211.

It is an arithmetic number, because the mean of its divisors is an integer number (63417519).

Almost surely, 2^421719205 is an apocalyptic number.

It is an amenable number.

421719205 is a deficient number, since it is larger than the sum of its proper divisors (85620947).

421719205 is a wasteful number, since it uses less digits than its factorization.

421719205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212855.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 421719205 is about 20535.8030035351. The cubic root of 421719205 is about 749.9076656700.

The spelling of 421719205 in words is "four hundred twenty-one million, seven hundred nineteen thousand, two hundred five".