355409 has 4 divisors (see below), whose sum is σ = 356916. Its totient is φ = 353904.

The previous prime is 355379. The next prime is 355417. The reversal of 355409 is 904553.

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 172225 + 183184 = 415^2 + 428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314 + ... + 899.

It is an arithmetic number, because the mean of its divisors is an integer number (89229).

2³⁵⁵⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

355409 is a deficient number, since it is larger than the sum of its proper divisors (1507).

355409 is a wasteful number, since it uses less digits than its factorization.

355409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 355409 is about 596.1618907646. The cubic root of 355409 is about 70.8341696172.

The spelling of 355409 in words is "three hundred fifty-five thousand, four hundred nine".