1285240804 has 6 divisors (see below), whose sum is σ = 2249171414. Its totient is φ = 642620400.

The previous prime is 1285240787. The next prime is 1285240823. The reversal of 1285240804 is 4080425821.

It can be written as a sum of positive squares in only one way, i.e., 1076496100 + 208744704 = 32810^2 + 14448^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1285240804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160655097 + ... + 160655104.

Almost surely, 2^1285240804 is an apocalyptic number.

It is an amenable number.

1285240804 is a deficient number, since it is larger than the sum of its proper divisors (963930610).

1285240804 is a wasteful number, since it uses less digits than its factorization.

1285240804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321310205 (or 321310203 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 1285240804 is about 35850.2552850046. The cubic root of 1285240804 is about 1087.2468757600.

The spelling of 1285240804 in words is "one billion, two hundred eighty-five million, two hundred forty thousand, eight hundred four".