1080142985 has 8 divisors (see below), whose sum is σ = 1309005576. Its totient is φ = 855558400.

The previous prime is 1080142981. The next prime is 1080143011. The reversal of 1080142985 is 5892410801.

It can be written as a sum of positive squares in 4 ways, for example, as 207590464 + 872552521 = 14408^2 + 29539^2 .

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

It is not a de Polignac number, because 1080142985 - 2² = 1080142981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1080142981) 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 in 7 ways as a sum of consecutive naturals, for example, 1068944 + ... + 1069953.

It is an arithmetic number, because the mean of its divisors is an integer number (163625697).

Almost surely, 2^1080142985 is an apocalyptic number.

It is an amenable number.

1080142985 is a deficient number, since it is larger than the sum of its proper divisors (228862591).

1080142985 is a wasteful number, since it uses less digits than its factorization.

1080142985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139003.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 1080142985 is about 32865.5288258077. The cubic root of 1080142985 is about 1026.0308439544.

The spelling of 1080142985 in words is "one billion, eighty million, one hundred forty-two thousand, nine hundred eighty-five".