421113420 has 288 divisors, whose sum is σ = 1608542208. Its totient is φ = 86800896.

The previous prime is 421113403. The next prime is 421113533. The reversal of 421113420 is 24311124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 421113393 and 421113402.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 769587 + ... + 770133.

It is an arithmetic number, because the mean of its divisors is an integer number (5585216).

Almost surely, 2^421113420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421113420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804271104).

421113420 is an abundant number, since it is smaller than the sum of its proper divisors (1187428788).

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

421113420 is a wasteful number, since it uses less digits than its factorization.

421113420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 421113420 is about 20521.0482188411. The cubic root of 421113420 is about 749.5484214904.

Adding to 421113420 its reverse (24311124), we get a palindrome (445424544).

The spelling of 421113420 in words is "four hundred twenty-one million, one hundred thirteen thousand, four hundred twenty".