420081865 has 8 divisors (see below), whose sum is σ = 576112320. Its totient is φ = 288056112.

The previous prime is 420081863. The next prime is 420081881. The reversal of 420081865 is 568180024.

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 420081865 - 2¹ = 420081863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420081865.

It is not an unprimeable number, because it can be changed into a prime (420081863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6001135 + ... + 6001204.

It is an arithmetic number, because the mean of its divisors is an integer number (72014040).

Almost surely, 2^420081865 is an apocalyptic number.

It is an amenable number.

420081865 is a deficient number, since it is larger than the sum of its proper divisors (156030455).

420081865 is a wasteful number, since it uses less digits than its factorization.

420081865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12002351.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 420081865 is about 20495.8987360886. The cubic root of 420081865 is about 748.9358924289.

The spelling of 420081865 in words is "four hundred twenty million, eighty-one thousand, eight hundred sixty-five".