274905 has 24 divisors (see below), whose sum is σ = 491400. Its totient is φ = 142080.

The previous prime is 274889. The next prime is 274909. The reversal of 274905 is 509472.

It can be written as a sum of positive squares in 4 ways, for example, as 8649 + 266256 = 93^2 + 516^2 .

It is not a de Polignac number, because 274905 - 2⁴ = 274889 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1771 + ... + 1919.

It is an arithmetic number, because the mean of its divisors is an integer number (20475).

2²⁷⁴⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

274905 is a deficient number, since it is larger than the sum of its proper divisors (216495).

274905 is a wasteful number, since it uses less digits than its factorization.

274905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 274905 is about 524.3138373150. The cubic root of 274905 is about 65.0220832263.

It can be divided in two parts, 27490 and 5, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 274905 in words is "two hundred seventy-four thousand, nine hundred five".