273405 has 16 divisors (see below), whose sum is σ = 477504. Its totient is φ = 132480.

The previous prime is 273367. The next prime is 273433. The reversal of 273405 is 504372.

It is a happy number.

It is not a de Polignac number, because 273405 - 2⁸ = 273149 is a prime.

273405 is a lucky number.

It is a plaindrome in base 12.

It is a nialpdrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664 + ... + 993.

It is an arithmetic number, because the mean of its divisors is an integer number (29844).

2²⁷³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

273405 is a deficient number, since it is larger than the sum of its proper divisors (204099).

273405 is a wasteful number, since it uses less digits than its factorization.

273405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 273405 is about 522.8814397165. The cubic root of 273405 is about 64.9036046504.

Adding to 273405 its reverse (504372), we get a palindrome (777777).

The spelling of 273405 in words is "two hundred seventy-three thousand, four hundred five".