273545 has 4 divisors (see below), whose sum is σ = 328260. Its totient is φ = 218832.

The previous prime is 273527. The next prime is 273551. The reversal of 273545 is 545372.

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

It can be written as a sum of positive squares in 2 ways, for example, as 100489 + 173056 = 317^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 273545 - 2⁸ = 273289 is a prime.

It is an Ulam number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 27350 + ... + 27359.

It is an arithmetic number, because the mean of its divisors is an integer number (82065).

2²⁷³⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

273545 is a deficient number, since it is larger than the sum of its proper divisors (54715).

273545 is an equidigital number, since it uses as much as digits as its factorization.

273545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54714.

The product of its digits is 4200, while the sum is 26.

The square root of 273545 is about 523.0152961434. The cubic root of 273545 is about 64.9146809586.

It can be divided in two parts, 273 and 545, that multiplied together give a triangular number (148785 = T₅₄₅).

The spelling of 273545 in words is "two hundred seventy-three thousand, five hundred forty-five".