421400560 has 80 divisors (see below), whose sum is σ = 1127088576. Its totient is φ = 143529984.

The previous prime is 421400557. The next prime is 421400569. The reversal of 421400560 is 65004124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421400569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85524 + ... + 90316.

Almost surely, 2^421400560 is an apocalyptic number.

421400560 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 421400560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563544288).

421400560 is an abundant number, since it is smaller than the sum of its proper divisors (705688016).

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

421400560 is a wasteful number, since it uses less digits than its factorization.

421400560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970 (or 4964 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 421400560 is about 20528.0432579435. The cubic root of 421400560 is about 749.7187449110.

Adding to 421400560 its reverse (65004124), we get a palindrome (486404684).

The spelling of 421400560 in words is "four hundred twenty-one million, four hundred thousand, five hundred sixty".