1285161585 has 8 divisors (see below), whose sum is σ = 2056258560. Its totient is φ = 685419504.

The previous prime is 1285161583. The next prime is 1285161587. The reversal of 1285161585 is 5851615821.

It is an interprime number because it is at equal distance from previous prime (1285161583) and next prime (1285161587).

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

It is not a de Polignac number, because 1285161585 - 2¹ = 1285161583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285161583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42838705 + ... + 42838734.

It is an arithmetic number, because the mean of its divisors is an integer number (257032320).

Almost surely, 2^1285161585 is an apocalyptic number.

1285161585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285161585 is a deficient number, since it is larger than the sum of its proper divisors (771096975).

1285161585 is an equidigital number, since it uses as much as digits as its factorization.

1285161585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85677447.

The product of its digits is 96000, while the sum is 42.

The square root of 1285161585 is about 35849.1504083430. The cubic root of 1285161585 is about 1087.2245369164.

The spelling of 1285161585 in words is "one billion, two hundred eighty-five million, one hundred sixty-one thousand, five hundred eighty-five".