421421826 has 32 divisors (see below), whose sum is σ = 977633280. Its totient is φ = 118608336.

The previous prime is 421421813. The next prime is 421421831. The reversal of 421421826 is 628124124.

It is a junction number, because it is equal to n+sod(n) for n = 421421793 and 421421802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72066 + ... + 77693.

It is an arithmetic number, because the mean of its divisors is an integer number (30551040).

Almost surely, 2^421421826 is an apocalyptic number.

421421826 is an abundant number, since it is smaller than the sum of its proper divisors (556211454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421421826 is a wasteful number, since it uses less digits than its factorization.

421421826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149838.

The product of its digits is 6144, while the sum is 30.

The square root of 421421826 is about 20528.5612257654. The cubic root of 421421826 is about 749.7313562300.

The spelling of 421421826 in words is "four hundred twenty-one million, four hundred twenty-one thousand, eight hundred twenty-six".