4240220421 has 8 divisors (see below), whose sum is σ = 5656608864. Its totient is φ = 2825322800.

The previous prime is 4240220417. The next prime is 4240220423. The reversal of 4240220421 is 1240220424.

4240220421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4240220421 - 2² = 4240220417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366051 + ... + 377456.

It is an arithmetic number, because the mean of its divisors is an integer number (707076108).

Almost surely, 2^4240220421 is an apocalyptic number.

It is an amenable number.

4240220421 is a deficient number, since it is larger than the sum of its proper divisors (1416388443).

4240220421 is a wasteful number, since it uses less digits than its factorization.

4240220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745411.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 4240220421 is about 65116.9749067016. The cubic root of 4240220421 is about 1618.5625135174.

Adding to 4240220421 its reverse (1240220424), we get a palindrome (5480440845).

The spelling of 4240220421 in words is "four billion, two hundred forty million, two hundred twenty thousand, four hundred twenty-one".