4221421040 has 20 divisors (see below), whose sum is σ = 9814804104. Its totient is φ = 1688568384.

The previous prime is 4221421027. The next prime is 4221421073. The reversal of 4221421040 is 401241224.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26383802 + ... + 26383961.

Almost surely, 2^4221421040 is an apocalyptic number.

4221421040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4221421040 is an abundant number, since it is smaller than the sum of its proper divisors (5593383064).

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

4221421040 is a wasteful number, since it uses less digits than its factorization.

4221421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52767776 (or 52767770 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4221421040 is about 64972.4637057885. The cubic root of 4221421040 is about 1616.1669578015.

Adding to 4221421040 its reverse (401241224), we get a palindrome (4622662264).

The spelling of 4221421040 in words is "four billion, two hundred twenty-one million, four hundred twenty-one thousand, forty".