349021 has 4 divisors (see below), whose sum is σ = 358492. Its totient is φ = 339552.

The previous prime is 349007. The next prime is 349039. The reversal of 349021 is 120943.

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 280900 + 68121 = 530^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 349021 - 2⁵ = 348989 is a prime.

It is a Duffinian number.

349021 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 349021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (89623).

2³⁴⁹⁰²¹ is an apocalyptic number.

It is an amenable number.

349021 is a deficient number, since it is larger than the sum of its proper divisors (9471).

349021 is an equidigital number, since it uses as much as digits as its factorization.

349021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 349021 is about 590.7799928908. The cubic root of 349021 is about 70.4072182897.

Adding to 349021 its reverse (120943), we get a palindrome (469964).

The spelling of 349021 in words is "three hundred forty-nine thousand, twenty-one".