1081239 has 8 divisors (see below), whose sum is σ = 1447152. Its totient is φ = 718080.

The previous prime is 1081237. The next prime is 1081243. The reversal of 1081239 is 9321801.

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

It is not a de Polignac number, because 1081239 - 2¹ = 1081237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081231) 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 in 7 ways as a sum of consecutive naturals, for example, 549 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (180894).

2^1081239 is an apocalyptic number.

1081239 is a deficient number, since it is larger than the sum of its proper divisors (365913).

1081239 is a wasteful number, since it uses less digits than its factorization.

1081239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1081239 is about 1039.8264278234. The cubic root of 1081239 is about 102.6377762547.

The spelling of 1081239 in words is "one million, eighty-one thousand, two hundred thirty-nine".