1285561304 has 8 divisors (see below), whose sum is σ = 2410427460. Its totient is φ = 642780648.

The previous prime is 1285561259. The next prime is 1285561307. The reversal of 1285561304 is 4031655821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285561307) 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 as a sum of consecutive naturals, namely, 80347574 + ... + 80347589.

Almost surely, 2^1285561304 is an apocalyptic number.

It is an amenable number.

1285561304 is a deficient number, since it is larger than the sum of its proper divisors (1124866156).

1285561304 is a wasteful number, since it uses less digits than its factorization.

1285561304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160695169 (or 160695165 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1285561304 is about 35854.7249884865. The cubic root of 1285561304 is about 1087.3372436924.

The spelling of 1285561304 in words is "one billion, two hundred eighty-five million, five hundred sixty-one thousand, three hundred four".