1285455875 has 32 divisors (see below), whose sum is σ = 1787415552. Its totient is φ = 914940000.

The previous prime is 1285455839. The next prime is 1285455877. The reversal of 1285455875 is 5785545821.

It is not a de Polignac number, because 1285455875 - 2¹⁶ = 1285390339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285455877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54680 + ... + 74570.

It is an arithmetic number, because the mean of its divisors is an integer number (55856736).

Almost surely, 2^1285455875 is an apocalyptic number.

1285455875 is a deficient number, since it is larger than the sum of its proper divisors (501959677).

1285455875 is a wasteful number, since it uses less digits than its factorization.

1285455875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19964 (or 19954 counting only the distinct ones).

The product of its digits is 2240000, while the sum is 50.

The square root of 1285455875 is about 35853.2547337058. The cubic root of 1285455875 is about 1087.3075186709.

The spelling of 1285455875 in words is "one billion, two hundred eighty-five million, four hundred fifty-five thousand, eight hundred seventy-five".