153605 has 8 divisors (see below), whose sum is σ = 190464. Its totient is φ = 118800.

The previous prime is 153589. The next prime is 153607. The reversal of 153605 is 506351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 153605 - 2⁴ = 153589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (23808).

2¹⁵³⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

153605 is a deficient number, since it is larger than the sum of its proper divisors (36859).

153605 is an equidigital number, since it uses as much as digits as its factorization.

153605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 153605 is about 391.9247376729. The cubic root of 153605 is about 53.5552171053. Note that the first 3 decimals are identical.

Adding to 153605 its reverse (506351), we get a palindrome (659956).

The spelling of 153605 in words is "one hundred fifty-three thousand, six hundred five".