4274821 has 4 divisors (see below), whose sum is σ = 4355532. Its totient is φ = 4194112.

The previous prime is 4274813. The next prime is 4274827. The reversal of 4274821 is 1284724.

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 3944196 + 330625 = 1986^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 4274821 - 2³ = 4274813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4274821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4274827) 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, 40276 + ... + 40381.

It is an arithmetic number, because the mean of its divisors is an integer number (1088883).

Almost surely, 2^4274821 is an apocalyptic number.

It is an amenable number.

4274821 is a deficient number, since it is larger than the sum of its proper divisors (80711).

4274821 is an equidigital number, since it uses as much as digits as its factorization.

4274821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80710.

The product of its digits is 3584, while the sum is 28.

The square root of 4274821 is about 2067.5640256108. The cubic root of 4274821 is about 162.2953130909.

The spelling of 4274821 in words is "four million, two hundred seventy-four thousand, eight hundred twenty-one".