1285480809 has 6 divisors (see below), whose sum is σ = 1856805626. Its totient is φ = 856987200.

The previous prime is 1285480799. The next prime is 1285480981. The reversal of 1285480809 is 9080845821.

It is a happy number.

1285480809 is a `hidden beast` number, since 1 + 28 + 548 + 0 + 80 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1210831209 + 74649600 = 34797^2 + 8640^2 .

It is not a de Polignac number, because 1285480809 - 2⁴ = 1285480793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285440809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71415592 + ... + 71415609.

Almost surely, 2^1285480809 is an apocalyptic number.

It is an amenable number.

1285480809 is a deficient number, since it is larger than the sum of its proper divisors (571324817).

1285480809 is a wasteful number, since it uses less digits than its factorization.

1285480809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142831207 (or 142831204 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 1285480809 is about 35853.6024549835. The cubic root of 1285480809 is about 1087.3145487970.

The spelling of 1285480809 in words is "one billion, two hundred eighty-five million, four hundred eighty thousand, eight hundred nine".