361865 has 16 divisors (see below), whose sum is σ = 508800. Its totient is φ = 246960.

The previous prime is 361843. The next prime is 361871. The reversal of 361865 is 568163.

It is not a de Polignac number, because 361865 - 2¹⁸ = 99721 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361865.

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, 1610 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (31800).

2³⁶¹⁸⁶⁵ is an apocalyptic number.

361865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

361865 is a deficient number, since it is larger than the sum of its proper divisors (146935).

361865 is an equidigital number, since it uses as much as digits as its factorization.

361865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 223 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 361865 is about 601.5521590020. The cubic root of 361865 is about 71.2604991197.

The spelling of 361865 in words is "three hundred sixty-one thousand, eight hundred sixty-five".