1285565852 has 6 divisors (see below), whose sum is σ = 2249740248. Its totient is φ = 642782924.

The previous prime is 1285565837. The next prime is 1285565863. The reversal of 1285565852 is 2585655821.

It is a junction number, because it is equal to n+sod(n) for n = 1285565797 and 1285565806.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 160695728 + ... + 160695735.

It is an arithmetic number, because the mean of its divisors is an integer number (374956708).

Almost surely, 2^1285565852 is an apocalyptic number.

It is an amenable number.

1285565852 is a deficient number, since it is larger than the sum of its proper divisors (964174396).

1285565852 is a wasteful number, since it uses less digits than its factorization.

1285565852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321391467 (or 321391465 counting only the distinct ones).

The product of its digits is 960000, while the sum is 47.

The square root of 1285565852 is about 35854.7884110337. The cubic root of 1285565852 is about 1087.3385259349.

The spelling of 1285565852 in words is "one billion, two hundred eighty-five million, five hundred sixty-five thousand, eight hundred fifty-two".