349621 has 4 divisors (see below), whose sum is σ = 351052. Its totient is φ = 348192.

The previous prime is 349603. The next prime is 349637. The reversal of 349621 is 126943.

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 7396 + 342225 = 86^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 349621 - 2⁵ = 349589 is a prime.

It is a d-powerful number, because it can be written as 3⁷ + 4⁴ + 6⁷ + 9⁵ + 2¹³ + 1 .

It is a Duffinian number.

349621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349121) 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, 246 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (87763).

2³⁴⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

349621 is a deficient number, since it is larger than the sum of its proper divisors (1431).

349621 is a wasteful number, since it uses less digits than its factorization.

349621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its digits is 1296, while the sum is 25.

The square root of 349621 is about 591.2875780870. The cubic root of 349621 is about 70.4475407409.

The spelling of 349621 in words is "three hundred forty-nine thousand, six hundred twenty-one".