421012163 has 16 divisors (see below), whose sum is σ = 495279456. Its totient is φ = 352823040.

The previous prime is 421012153. The next prime is 421012199. The reversal of 421012163 is 361210124.

It is a cyclic number.

It is not a de Polignac number, because 421012163 - 2¹² = 421008067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421012153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141095 + ... + 144047.

It is an arithmetic number, because the mean of its divisors is an integer number (30954966).

Almost surely, 2^421012163 is an apocalyptic number.

421012163 is a deficient number, since it is larger than the sum of its proper divisors (74267293).

421012163 is a wasteful number, since it uses less digits than its factorization.

421012163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 421012163 is about 20518.5809207167. The cubic root of 421012163 is about 749.4883402036.

Adding to 421012163 its reverse (361210124), we get a palindrome (782222287).

The spelling of 421012163 in words is "four hundred twenty-one million, twelve thousand, one hundred sixty-three".