274405 has 4 divisors (see below), whose sum is σ = 329292. Its totient is φ = 219520.

The previous prime is 274403. The next prime is 274423. The reversal of 274405 is 504472.

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 49729 + 224676 = 223^2 + 474^2 .

It is not a de Polignac number, because 274405 - 2¹ = 274403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27436 + ... + 27445.

It is an arithmetic number, because the mean of its divisors is an integer number (82323).

2²⁷⁴⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

274405 is a deficient number, since it is larger than the sum of its proper divisors (54887).

274405 is an equidigital number, since it uses as much as digits as its factorization.

274405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54886.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 274405 is about 523.8368066488. The cubic root of 274405 is about 64.9826383611.

Adding to 274405 its reverse (504472), we get a palindrome (778877).

The spelling of 274405 in words is "two hundred seventy-four thousand, four hundred five".