4252821 has 8 divisors (see below), whose sum is σ = 5866080. Its totient is φ = 2737392.

The previous prime is 4252819. The next prime is 4252823. The reversal of 4252821 is 1282524.

It is an interprime number because it is at equal distance from previous prime (4252819) and next prime (4252823).

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

It is not a de Polignac number, because 4252821 - 2¹ = 4252819 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4252791 and 4252800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4252823) 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, 24355 + ... + 24528.

It is an arithmetic number, because the mean of its divisors is an integer number (733260).

Almost surely, 2^4252821 is an apocalyptic number.

It is an amenable number.

4252821 is a deficient number, since it is larger than the sum of its proper divisors (1613259).

4252821 is a wasteful number, since it uses less digits than its factorization.

4252821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48915.

The product of its digits is 1280, while the sum is 24.

The square root of 4252821 is about 2062.2368923089. The cubic root of 4252821 is about 162.0164211368.

The spelling of 4252821 in words is "four million, two hundred fifty-two thousand, eight hundred twenty-one".