281901 has 4 divisors (see below), whose sum is σ = 375872. Its totient is φ = 187932.

The previous prime is 281893. The next prime is 281921. The reversal of 281901 is 109182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 281901 - 2³ = 281893 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281921) 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, 46981 + ... + 46986.

It is an arithmetic number, because the mean of its divisors is an integer number (93968).

2²⁸¹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

281901 is a deficient number, since it is larger than the sum of its proper divisors (93971).

281901 is an equidigital number, since it uses as much as digits as its factorization.

281901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93970.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 281901 is about 530.9434998190. The cubic root of 281901 is about 65.5690470918.

The spelling of 281901 in words is "two hundred eighty-one thousand, nine hundred one".