4427021 has 4 divisors (see below), whose sum is σ = 4687452. Its totient is φ = 4166592.

The previous prime is 4427009. The next prime is 4427029. The reversal of 4427021 is 1207244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3880900 + 546121 = 1970^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 4427021 - 2⁶ = 4426957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4426984 and 4427002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4427029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130190 + ... + 130223.

It is an arithmetic number, because the mean of its divisors is an integer number (1171863).

Almost surely, 2^4427021 is an apocalyptic number.

It is an amenable number.

4427021 is a deficient number, since it is larger than the sum of its proper divisors (260431).

4427021 is a wasteful number, since it uses less digits than its factorization.

4427021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260430.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 4427021 is about 2104.0487161660. The cubic root of 4427021 is about 164.1990073739.

The spelling of 4427021 in words is "four million, four hundred twenty-seven thousand, twenty-one".