421854147009 has 15 divisors (see below), whose sum is σ = 630185914897. Its totient is φ = 281232200988.

The previous prime is 421854146983. The next prime is 421854147049. The reversal of 421854147009 is 900741458124.

The square root of 421854147009 is 649503.

It is a perfect power (a square), and thus also a powerful number.

421854147009 is a `hidden beast` number, since 421 + 85 + 4 + 147 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 421854147009 - 2¹⁷ = 421854015937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421854147049) by changing a digit.

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 14 ways as a sum of consecutive naturals, for example, 5809444 + ... + 5881610.

Almost surely, 2^421854147009 is an apocalyptic number.

421854147009 is the 649503-rd square number.

421854147009 is the 324752-nd centered octagonal number.

It is an amenable number.

421854147009 is a deficient number, since it is larger than the sum of its proper divisors (208331767888).

421854147009 is an frugal number, since it uses more digits than its factorization.

421854147009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144346 (or 72170 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 421854147009 in words is "four hundred twenty-one billion, eight hundred fifty-four million, one hundred forty-seven thousand, nine".