355645 has 4 divisors (see below), whose sum is σ = 426780. Its totient is φ = 284512.

The previous prime is 355643. The next prime is 355651. The reversal of 355645 is 546553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546553 = 7 ⋅78079.

It can be written as a sum of positive squares in 2 ways, for example, as 98596 + 257049 = 314^2 + 507^2 .

It is a cyclic number.

It is not a de Polignac number, because 355645 - 2¹ = 355643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355643) 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, 35560 + ... + 35569.

It is an arithmetic number, because the mean of its divisors is an integer number (106695).

2³⁵⁵⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

355645 is a deficient number, since it is larger than the sum of its proper divisors (71135).

355645 is an equidigital number, since it uses as much as digits as its factorization.

355645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71134.

The product of its digits is 9000, while the sum is 28.

The square root of 355645 is about 596.3597907304. The cubic root of 355645 is about 70.8498446707.

It can be divided in two parts, 355 and 645, that added together give a cube (1000 = 10³).

The spelling of 355645 in words is "three hundred fifty-five thousand, six hundred forty-five".