1285365904 has 15 divisors (see below), whose sum is σ = 2490674323. Its totient is φ = 642611248.

The previous prime is 1285365901. The next prime is 1285365919. The reversal of 1285365904 is 4095635821.

The square root of 1285365904 is 35852.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285365901) 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 2 ways as a sum of consecutive naturals, for example, 138927 + ... + 147889.

Almost surely, 2^1285365904 is an apocalyptic number.

1285365904 is the 35852-nd square number.

It is an amenable number.

1285365904 is a deficient number, since it is larger than the sum of its proper divisors (1205308419).

1285365904 is an frugal number, since it uses more digits than its factorization.

1285365904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17934 (or 8965 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The cubic root of 1285365904 is about 1087.2821506468.

The spelling of 1285365904 in words is "one billion, two hundred eighty-five million, three hundred sixty-five thousand, nine hundred four".