126281 has 4 divisors (see below), whose sum is σ = 129732. Its totient is φ = 122832.

The previous prime is 126271. The next prime is 126307. The reversal of 126281 is 182621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116281 + 10000 = 341^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 126281 - 2¹⁴ = 109897 is a prime.

It is a super-2 number, since 2×126281² = 31893781922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 126281.

It is not an unprimeable number, because it can be changed into a prime (126211) 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, 1670 + ... + 1743.

It is an arithmetic number, because the mean of its divisors is an integer number (32433).

2¹²⁶²⁸¹ is an apocalyptic number.

It is an amenable number.

126281 is a deficient number, since it is larger than the sum of its proper divisors (3451).

126281 is an equidigital number, since it uses as much as digits as its factorization.

126281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450.

The product of its digits is 192, while the sum is 20.

The square root of 126281 is about 355.3603804590. The cubic root of 126281 is about 50.1702198465.

The spelling of 126281 in words is "one hundred twenty-six thousand, two hundred eighty-one".