123281 has 8 divisors (see below), whose sum is σ = 130944. Its totient is φ = 115920.

The previous prime is 123269. The next prime is 123289. The reversal of 123281 is 182321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123281 - 2⁶ = 123217 is a prime.

It is a super-2 number, since 2×123281² = 30396409922, which contains 22 as substring.

It is a Duffinian 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 123281.

It is not an unprimeable number, because it can be changed into a prime (123289) 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, 1991 + ... + 2051.

It is an arithmetic number, because the mean of its divisors is an integer number (16368).

2¹²³²⁸¹ is an apocalyptic number.

It is an amenable number.

123281 is a deficient number, since it is larger than the sum of its proper divisors (7663).

123281 is an equidigital number, since it uses as much as digits as its factorization.

123281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151.

The product of its digits is 96, while the sum is 17.

The square root of 123281 is about 351.1139416201. The cubic root of 123281 is about 49.7697412459.

It can be divided in two parts, 123 and 281, that added together give a palindrome (404).

The spelling of 123281 in words is "one hundred twenty-three thousand, two hundred eighty-one".