153506 has 4 divisors (see below), whose sum is σ = 230262. Its totient is φ = 76752.

The previous prime is 153499. The next prime is 153509. The reversal of 153506 is 605351.

153506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605351 = 131 ⋅4621.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 625 = 391^2 + 25^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (153509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38375 + ... + 38378.

2¹⁵³⁵⁰⁶ is an apocalyptic number.

153506 is a deficient number, since it is larger than the sum of its proper divisors (76756).

153506 is an equidigital number, since it uses as much as digits as its factorization.

153506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76755.

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

The square root of 153506 is about 391.7984175568. The cubic root of 153506 is about 53.5437090034.

Adding to 153506 its reverse (605351), we get a palindrome (758857).

The spelling of 153506 in words is "one hundred fifty-three thousand, five hundred six".