1285315904 has 28 divisors (see below), whose sum is σ = 2551712448. Its totient is φ = 642364800.

The previous prime is 1285315849. The next prime is 1285315907. The reversal of 1285315904 is 4095135821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285315907) 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 3 ways as a sum of consecutive naturals, for example, 229619 + ... + 235149.

Almost surely, 2^1285315904 is an apocalyptic number.

It is an amenable number.

1285315904 is a deficient number, since it is larger than the sum of its proper divisors (1266396544).

1285315904 is an equidigital number, since it uses as much as digits as its factorization.

1285315904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174 (or 9164 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1285315904 is about 35851.3026820505. The cubic root of 1285315904 is about 1087.2680522456.

The spelling of 1285315904 in words is "one billion, two hundred eighty-five million, three hundred fifteen thousand, nine hundred four".