272781 has 8 divisors (see below), whose sum is σ = 404160. Its totient is φ = 181836.

The previous prime is 272777. The next prime is 272807. The reversal of 272781 is 187272.

It is not a de Polignac number, because 272781 - 2² = 272777 is a prime.

It is a super-2 number, since 2×272781² = 148818947922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 10103 = 272781 / (2 + 7 + 2 + 7 + 8 + 1).

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

272781 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 272781.

It is not an unprimeable number, because it can be changed into a prime (272761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5025 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (50520).

2²⁷²⁷⁸¹ is an apocalyptic number.

It is an amenable number.

272781 is a deficient number, since it is larger than the sum of its proper divisors (131379).

272781 is a wasteful number, since it uses less digits than its factorization.

272781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10112 (or 10106 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 272781 is about 522.2844052813. The cubic root of 272781 is about 64.8541899240.

The spelling of 272781 in words is "two hundred seventy-two thousand, seven hundred eighty-one".