421414021 has 8 divisors (see below), whose sum is σ = 487028160. Its totient is φ = 357152928.

The previous prime is 421414013. The next prime is 421414057. The reversal of 421414021 is 120414124.

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 421414021 - 2³ = 421414013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421414021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421414001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337591 + ... + 338836.

It is an arithmetic number, because the mean of its divisors is an integer number (60878520).

Almost surely, 2^421414021 is an apocalyptic number.

It is an amenable number.

421414021 is a deficient number, since it is larger than the sum of its proper divisors (65614139).

421414021 is an equidigital number, since it uses as much as digits as its factorization.

421414021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676523.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 421414021 is about 20528.3711238861. The cubic root of 421414021 is about 749.7267277010.

Adding to 421414021 its reverse (120414124), we get a palindrome (541828145).

The spelling of 421414021 in words is "four hundred twenty-one million, four hundred fourteen thousand, twenty-one".