1080639 has 24 divisors (see below), whose sum is σ = 1890720. Its totient is φ = 580608.

The previous prime is 1080613. The next prime is 1080647. The reversal of 1080639 is 9360801.

It is not a de Polignac number, because 1080639 - 2⁸ = 1080383 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080649) 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 23 ways as a sum of consecutive naturals, for example, 567 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (78780).

2^1080639 is an apocalyptic number.

1080639 is a deficient number, since it is larger than the sum of its proper divisors (810081).

1080639 is a wasteful number, since it uses less digits than its factorization.

1080639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1080639 is about 1039.5378780978. The cubic root of 1080639 is about 102.6187875265.

The spelling of 1080639 in words is "one million, eighty thousand, six hundred thirty-nine".