281020 has 12 divisors (see below), whose sum is σ = 590184. Its totient is φ = 112400.

The previous prime is 280997. The next prime is 281023. The reversal of 281020 is 20182.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7006 + ... + 7045.

It is an arithmetic number, because the mean of its divisors is an integer number (49182).

2²⁸¹⁰²⁰ is an apocalyptic number.

281020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281020 is an abundant number, since it is smaller than the sum of its proper divisors (309164).

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

281020 is a wasteful number, since it uses less digits than its factorization.

281020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14060 (or 14058 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 281020 is about 530.1131954592. The cubic root of 281020 is about 65.5006701173.

The spelling of 281020 in words is "two hundred eighty-one thousand, twenty".