273506 has 4 divisors (see below), whose sum is σ = 410262. Its totient is φ = 136752.

The previous prime is 273503. The next prime is 273517. The reversal of 273506 is 605372.

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

It can be written as a sum of positive squares in only one way, i.e., 265225 + 8281 = 515^2 + 91^2 .

It is not an unprimeable number, because it can be changed into a prime (273503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68375 + ... + 68378.

2²⁷³⁵⁰⁶ is an apocalyptic number.

273506 is a deficient number, since it is larger than the sum of its proper divisors (136756).

273506 is a wasteful number, since it uses less digits than its factorization.

273506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136755.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 273506 is about 522.9780110100. The cubic root of 273506 is about 64.9115957954.

Adding to 273506 its sum of digits (23), we get a square (273529 = 523²).

Adding to 273506 its reverse (605372), we get a palindrome (878878).

The spelling of 273506 in words is "two hundred seventy-three thousand, five hundred six".