361855 has 16 divisors (see below), whose sum is σ = 493920. Its totient is φ = 252288.

The previous prime is 361843. The next prime is 361871. The reversal of 361855 is 558163.

It is a cyclic number.

It is not a de Polignac number, because 361855 - 2⁷ = 361727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1089 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2³⁶¹⁸⁵⁵ is an apocalyptic number.

361855 is a deficient number, since it is larger than the sum of its proper divisors (132065).

361855 is a wasteful number, since it uses less digits than its factorization.

361855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

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

The square root of 361855 is about 601.5438471134. The cubic root of 361855 is about 71.2598426948.

It can be divided in two parts, 36 and 1855, that added together give a triangular number (1891 = T₆₁).

The spelling of 361855 in words is "three hundred sixty-one thousand, eight hundred fifty-five".