421004121 has 24 divisors (see below), whose sum is σ = 589382976. Its totient is φ = 267289440.

The previous prime is 421004063. The next prime is 421004123. The reversal of 421004121 is 121400124.

It is not a de Polignac number, because 421004121 - 2⁷ = 421003993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421004121.

It is not an unprimeable number, because it can be changed into a prime (421004123) 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 23 ways as a sum of consecutive naturals, for example, 493131 + ... + 493983.

It is an arithmetic number, because the mean of its divisors is an integer number (24557624).

Almost surely, 2^421004121 is an apocalyptic number.

It is an amenable number.

421004121 is a deficient number, since it is larger than the sum of its proper divisors (168378855).

421004121 is a wasteful number, since it uses less digits than its factorization.

421004121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 421004121 is about 20518.3849510628. The cubic root of 421004121 is about 749.4835680345.

Adding to 421004121 its reverse (121400124), we get a palindrome (542404245).

The spelling of 421004121 in words is "four hundred twenty-one million, four thousand, one hundred twenty-one".