420243121 has 8 divisors (see below), whose sum is σ = 451774080. Its totient is φ = 389653488.

The previous prime is 420243119. The next prime is 420243139. The reversal of 420243121 is 121342024.

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 420243121 - 2¹ = 420243119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420243221) 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, 234406 + ... + 236191.

It is an arithmetic number, because the mean of its divisors is an integer number (56471760).

Almost surely, 2^420243121 is an apocalyptic number.

It is an amenable number.

420243121 is a deficient number, since it is larger than the sum of its proper divisors (31530959).

420243121 is a wasteful number, since it uses less digits than its factorization.

420243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470663.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 420243121 is about 20499.8322188256. The cubic root of 420243121 is about 749.0317110192.

Adding to 420243121 its reverse (121342024), we get a palindrome (541585145).

The spelling of 420243121 in words is "four hundred twenty million, two hundred forty-three thousand, one hundred twenty-one".