274981 has 8 divisors (see below), whose sum is σ = 317504. Its totient is φ = 233280.

The previous prime is 274973. The next prime is 274993. The reversal of 274981 is 189472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 6-Lehmer number, since φ(274981) divides (274981-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 274981 - 2³ = 274973 is a prime.

It is a super-2 number, since 2×274981² = 151229100722, which contains 22 as substring.

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

It is a Duffinian number.

274981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274931) 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 in 7 ways as a sum of consecutive naturals, for example, 1021 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (39688).

2²⁷⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

274981 is a deficient number, since it is larger than the sum of its proper divisors (42523).

274981 is a wasteful number, since it uses less digits than its factorization.

274981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its digits is 4032, while the sum is 31.

The square root of 274981 is about 524.3863079830. The cubic root of 274981 is about 65.0280746573.

The spelling of 274981 in words is "two hundred seventy-four thousand, nine hundred eighty-one".