4270021 has 8 divisors (see below), whose sum is σ = 4892544. Its totient is φ = 3650640.

The previous prime is 4269983. The next prime is 4270031. The reversal of 4270021 is 1200724.

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

It is not a de Polignac number, because 4270021 - 2¹¹ = 4267973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4269977 and 4270004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4270031) 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, 4791 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (611568).

Almost surely, 2^4270021 is an apocalyptic number.

It is an amenable number.

4270021 is a deficient number, since it is larger than the sum of its proper divisors (622523).

4270021 is an equidigital number, since it uses as much as digits as its factorization.

4270021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 4270021 is about 2066.4029132771. The cubic root of 4270021 is about 162.2345456920.

Adding to 4270021 its reverse (1200724), we get a palindrome (5470745).

The spelling of 4270021 in words is "four million, two hundred seventy thousand, twenty-one".