281140 has 12 divisors (see below), whose sum is σ = 590436. Its totient is φ = 112448.

The previous prime is 281131. The next prime is 281153. The reversal of 281140 is 41182.

281140 = T₉₈ + T₉₉ + ... + T₁₃₇.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44944 + 236196 = 212^2 + 486^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7009 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (49203).

2²⁸¹¹⁴⁰ is an apocalyptic number.

281140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281140 is an abundant number, since it is smaller than the sum of its proper divisors (309296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281140 is a wasteful number, since it uses less digits than its factorization.

281140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14066 (or 14064 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 281140 is about 530.2263667529. The cubic root of 281140 is about 65.5099920657.

It can be divided in two parts, 281 and 140, that multiplied together give a triangular number (39340 = T₂₈₀).

The spelling of 281140 in words is "two hundred eighty-one thousand, one hundred forty".