143506 has 12 divisors (see below), whose sum is σ = 237006. Its totient is φ = 65120.

The previous prime is 143503. The next prime is 143509. The reversal of 143506 is 605341.

143506 = T₁₅₆ + T₁₅₇ + ... + T₁₆₆.

It is an interprime number because it is at equal distance from previous prime (143503) and next prime (143509).

It can be written as a sum of positive squares in only one way, i.e., 116281 + 27225 = 341^2 + 165^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55 + ... + 538.

2¹⁴³⁵⁰⁶ is an apocalyptic number.

143506 is a deficient number, since it is larger than the sum of its proper divisors (93500).

143506 is a wasteful number, since it uses less digits than its factorization.

143506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 143506 is about 378.8218578699. The cubic root of 143506 is about 52.3548218875.

Adding to 143506 its reverse (605341), we get a palindrome (748847).

The spelling of 143506 in words is "one hundred forty-three thousand, five hundred six".