355861 has 12 divisors (see below), whose sum is σ = 416556. Its totient is φ = 302720.

The previous prime is 355853. The next prime is 355867. The reversal of 355861 is 168553.

It can be written as a sum of positive squares in 2 ways, for example, as 302500 + 53361 = 550^2 + 231^2 .

It is not a de Polignac number, because 355861 - 2³ = 355853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1971 + ... + 2143.

It is an arithmetic number, because the mean of its divisors is an integer number (34713).

2³⁵⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

355861 is a deficient number, since it is larger than the sum of its proper divisors (60695).

355861 is a wasteful number, since it uses less digits than its factorization.

355861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 201 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 355861 is about 596.5408619701. The cubic root of 355861 is about 70.8641852531.

The spelling of 355861 in words is "three hundred fifty-five thousand, eight hundred sixty-one".