4275821 has 4 divisors (see below), whose sum is σ = 4664544. Its totient is φ = 3887100.

The previous prime is 4275811. The next prime is 4275841. The reversal of 4275821 is 1285724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4275821 - 2¹⁰ = 4274797 is a prime.

It is a d-powerful number, because it can be written as 4 + 2¹⁶ + 7³ + 5⁶ + 8 + 2²² + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4275811) 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, 194345 + ... + 194366.

It is an arithmetic number, because the mean of its divisors is an integer number (1166136).

Almost surely, 2^4275821 is an apocalyptic number.

It is an amenable number.

4275821 is a deficient number, since it is larger than the sum of its proper divisors (388723).

4275821 is a wasteful number, since it uses less digits than its factorization.

4275821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388722.

The product of its digits is 4480, while the sum is 29.

The square root of 4275821 is about 2067.8058419494. The cubic root of 4275821 is about 162.3079672394.

The spelling of 4275821 in words is "four million, two hundred seventy-five thousand, eight hundred twenty-one".