355421 has 8 divisors (see below), whose sum is σ = 393600. Its totient is φ = 318240.

The previous prime is 355417. The next prime is 355427. The reversal of 355421 is 124553.

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

It is a cyclic number.

It is not a de Polignac number, because 355421 - 2² = 355417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 355393 and 355402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355427) 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 7 ways as a sum of consecutive naturals, for example, 665 + ... + 1073.

It is an arithmetic number, because the mean of its divisors is an integer number (49200).

2³⁵⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

355421 is a deficient number, since it is larger than the sum of its proper divisors (38179).

355421 is a wasteful number, since it uses less digits than its factorization.

355421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499.

The product of its digits is 600, while the sum is 20.

The square root of 355421 is about 596.1719550599. The cubic root of 355421 is about 70.8349668212.

Adding to 355421 its reverse (124553), we get a palindrome (479974).

The spelling of 355421 in words is "three hundred fifty-five thousand, four hundred twenty-one".