1285537660 has 48 divisors (see below), whose sum is σ = 2949851520. Its totient is φ = 466706240.

The previous prime is 1285537613. The next prime is 1285537703. The reversal of 1285537660 is 667355821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140547 + ... + 149413.

It is an arithmetic number, because the mean of its divisors is an integer number (61455240).

Almost surely, 2^1285537660 is an apocalyptic number.

1285537660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285537660 is an abundant number, since it is smaller than the sum of its proper divisors (1664313860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285537660 is a wasteful number, since it uses less digits than its factorization.

1285537660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9546 (or 9544 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 1285537660 is about 35854.3952675261. The cubic root of 1285537660 is about 1087.3305775616.

The spelling of 1285537660 in words is "one billion, two hundred eighty-five million, five hundred thirty-seven thousand, six hundred sixty".