361665 has 40 divisors (see below), whose sum is σ = 696960. Its totient is φ = 178848.

The previous prime is 361663. The next prime is 361679. The reversal of 361665 is 566163.

It is not a de Polignac number, because 361665 - 2¹ = 361663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361665.

It is not an unprimeable number, because it can be changed into a prime (361663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7672 + ... + 7718.

It is an arithmetic number, because the mean of its divisors is an integer number (17424).

2³⁶¹⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

361665 is a deficient number, since it is larger than the sum of its proper divisors (335295).

361665 is a wasteful number, since it uses less digits than its factorization.

361665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 74 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 361665 is about 601.3858994024. The cubic root of 361665 is about 71.2473683239.

The spelling of 361665 in words is "three hundred sixty-one thousand, six hundred sixty-five".