153565 has 4 divisors (see below), whose sum is σ = 184284. Its totient is φ = 122848.

The previous prime is 153563. The next prime is 153589. The reversal of 153565 is 565351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565351 = 53 ⋅10667.

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 52441 = 318^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 153565 - 2¹ = 153563 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153563) 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, 15352 + ... + 15361.

It is an arithmetic number, because the mean of its divisors is an integer number (46071).

2¹⁵³⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

153565 is a deficient number, since it is larger than the sum of its proper divisors (30719).

153565 is an equidigital number, since it uses as much as digits as its factorization.

153565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30718.

The product of its digits is 2250, while the sum is 25.

The square root of 153565 is about 391.8737041446. The cubic root of 153565 is about 53.5505679626.

It can be divided in two parts, 1535 and 65, that added together give a square (1600 = 40²).

The spelling of 153565 in words is "one hundred fifty-three thousand, five hundred sixty-five".