1285573849 has 12 divisors (see below), whose sum is σ = 1504427904. Its totient is φ = 1095315144.

The previous prime is 1285573831. The next prime is 1285573889. The reversal of 1285573849 is 9483755821.

It is a happy number.

It is not a de Polignac number, because 1285573849 - 2¹¹ = 1285571801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285573796 and 1285573805.

It is not an unprimeable number, because it can be changed into a prime (1285573889) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 70369 + ... + 86734.

It is an arithmetic number, because the mean of its divisors is an integer number (125368992).

Almost surely, 2^1285573849 is an apocalyptic number.

It is an amenable number.

1285573849 is a deficient number, since it is larger than the sum of its proper divisors (218854055).

1285573849 is a wasteful number, since it uses less digits than its factorization.

1285573849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157284 (or 157277 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The square root of 1285573849 is about 35854.8999301351. The cubic root of 1285573849 is about 1087.3407805655.

The spelling of 1285573849 in words is "one billion, two hundred eighty-five million, five hundred seventy-three thousand, eight hundred forty-nine".