240881 has 2 divisors, whose sum is σ = 240882. Its totient is φ = 240880.

The previous prime is 240869. The next prime is 240883. The reversal of 240881 is 188042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207025 + 33856 = 455^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 240881 - 2¹⁰ = 239857 is a prime.

It is a super-2 number, since 2×240881² = 116047312322, which contains 22 as substring.

Together with 240883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120440 + 120441.

It is an arithmetic number, because the mean of its divisors is an integer number (120441).

2²⁴⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

240881 is a deficient number, since it is larger than the sum of its proper divisors (1).

240881 is an equidigital number, since it uses as much as digits as its factorization.

240881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 240881 is about 490.7962917545. The cubic root of 240881 is about 62.2205981483.

The spelling of 240881 in words is "two hundred forty thousand, eight hundred eighty-one".