421010040 has 128 divisors (see below), whose sum is σ = 1383609600. Its totient is φ = 101637120.

The previous prime is 421010003. The next prime is 421010041. The reversal of 421010040 is 40010124.

421010040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 421009998 and 421010025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421010041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412651 + ... + 413669.

It is an arithmetic number, because the mean of its divisors is an integer number (10809450).

Almost surely, 2^421010040 is an apocalyptic number.

421010040 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 421010040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691804800).

421010040 is an abundant number, since it is smaller than the sum of its proper divisors (962599560).

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

421010040 is a wasteful number, since it uses less digits than its factorization.

421010040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1353 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 421010040 is about 20518.5291870543. The cubic root of 421010040 is about 749.4870804091.

Adding to 421010040 its reverse (40010124), we get a palindrome (461020164).

The spelling of 421010040 in words is "four hundred twenty-one million, ten thousand, forty".