1081231 has 2 divisors, whose sum is σ = 1081232. Its totient is φ = 1081230.

The previous prime is 1081229. The next prime is 1081237. The reversal of 1081231 is 1321801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1081231 - 2¹ = 1081229 is a prime.

It is a super-2 number, since 2×1081231² = 2338120950722, which contains 22 as substring.

Together with 1081229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540615 + 540616.

It is an arithmetic number, because the mean of its divisors is an integer number (540616).

2^1081231 is an apocalyptic number.

1081231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081231 is an equidigital number, since it uses as much as digits as its factorization.

1081231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1081231 is about 1039.8225810204. The cubic root of 1081231 is about 102.6375231179.

The spelling of 1081231 in words is "one million, eighty-one thousand, two hundred thirty-one".