352821 has 16 divisors (see below), whose sum is σ = 549504. Its totient is φ = 197184.

The previous prime is 352819. The next prime is 352831. The reversal of 352821 is 128253.

352821 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 352821 - 2¹ = 352819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (352831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (34344).

2³⁵²⁸²¹ is an apocalyptic number.

It is an amenable number.

352821 is a deficient number, since it is larger than the sum of its proper divisors (196683).

352821 is a wasteful number, since it uses less digits than its factorization.

352821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its digits is 480, while the sum is 21.

The square root of 352821 is about 593.9873736032. The cubic root of 352821 is about 70.6618183257.

It can be divided in two parts, 3528 and 21, that multiplied together give a cube (74088 = 42³).

The spelling of 352821 in words is "three hundred fifty-two thousand, eight hundred twenty-one".