355621 has 8 divisors (see below), whose sum is σ = 411264. Its totient is φ = 301200.

The previous prime is 355609. The next prime is 355633. The reversal of 355621 is 126553.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (355609) and next prime (355633).

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 355621 - 2⁹ = 355109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 355592 and 355601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355651) 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, 456 + ... + 958.

It is an arithmetic number, because the mean of its divisors is an integer number (51408).

2³⁵⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

355621 is a deficient number, since it is larger than the sum of its proper divisors (55643).

355621 is a wasteful number, since it uses less digits than its factorization.

355621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611.

The product of its digits is 900, while the sum is 22.

The square root of 355621 is about 596.3396683099. The cubic root of 355621 is about 70.8482509143.

The spelling of 355621 in words is "three hundred fifty-five thousand, six hundred twenty-one".