421405120 has 56 divisors (see below), whose sum is σ = 1022445504. Its totient is φ = 165374976.

The previous prime is 421405111. The next prime is 421405133. The reversal of 421405120 is 21504124.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4537 + ... + 29383.

Almost surely, 2^421405120 is an apocalyptic number.

421405120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421405120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511222752).

421405120 is an abundant number, since it is smaller than the sum of its proper divisors (601040384).

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

421405120 is a wasteful number, since it uses less digits than its factorization.

421405120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24917 (or 24907 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 421405120 is about 20528.1543252188. The cubic root of 421405120 is about 749.7214491513.

Adding to 421405120 its reverse (21504124), we get a palindrome (442909244).

The spelling of 421405120 in words is "four hundred twenty-one million, four hundred five thousand, one hundred twenty".