361565 has 4 divisors (see below), whose sum is σ = 433884. Its totient is φ = 289248.

The previous prime is 361561. The next prime is 361577. The reversal of 361565 is 565163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 109561 = 502^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 361565 - 2² = 361561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361565.

It is not an unprimeable number, because it can be changed into a prime (361561) 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, 36152 + ... + 36161.

It is an arithmetic number, because the mean of its divisors is an integer number (108471).

2³⁶¹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

361565 is a deficient number, since it is larger than the sum of its proper divisors (72319).

361565 is an equidigital number, since it uses as much as digits as its factorization.

361565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72318.

The product of its digits is 2700, while the sum is 26.

The square root of 361565 is about 601.3027523636. The cubic root of 361565 is about 71.2408011106.

The spelling of 361565 in words is "three hundred sixty-one thousand, five hundred sixty-five".