281972 has 12 divisors (see below), whose sum is σ = 497700. Its totient is φ = 139776.

The previous prime is 281971. The next prime is 281989. The reversal of 281972 is 279182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 126736 + 155236 = 356^2 + 394^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281971) 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, 404 + ... + 852.

It is an arithmetic number, because the mean of its divisors is an integer number (41475).

2²⁸¹⁹⁷² is an apocalyptic number.

It is an amenable number.

281972 is a deficient number, since it is larger than the sum of its proper divisors (215728).

281972 is a wasteful number, since it uses less digits than its factorization.

281972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 281972 is about 531.0103577144. The cubic root of 281972 is about 65.5745514019.

The spelling of 281972 in words is "two hundred eighty-one thousand, nine hundred seventy-two".