1285984445 has 8 divisors (see below), whose sum is σ = 1579069536. Its totient is φ = 1004862096.

The previous prime is 1285984327. The next prime is 1285984457. The reversal of 1285984445 is 5444895821.

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

It is a cyclic number.

It is not a de Polignac number, because 1285984445 - 2¹⁰ = 1285983421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1285984393 and 1285984402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2990447 + ... + 2990876.

It is an arithmetic number, because the mean of its divisors is an integer number (197383692).

Almost surely, 2^1285984445 is an apocalyptic number.

It is an amenable number.

1285984445 is a deficient number, since it is larger than the sum of its proper divisors (293085091).

1285984445 is an equidigital number, since it uses as much as digits as its factorization.

1285984445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981371.

The product of its digits is 1843200, while the sum is 50.

The square root of 1285984445 is about 35860.6252734109. The cubic root of 1285984445 is about 1087.4565292000.

The spelling of 1285984445 in words is "one billion, two hundred eighty-five million, nine hundred eighty-four thousand, four hundred forty-five".