1285611560 has 32 divisors (see below), whose sum is σ = 2895617160. Its totient is φ = 513712896.

The previous prime is 1285611517. The next prime is 1285611631. The reversal of 1285611560 is 651165821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1282069636 + 3541924 = 35806^2 + 1882^2 .

It is a super-3 number, since 3×1285611560³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1285611560.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23762 + ... + 55998.

Almost surely, 2^1285611560 is an apocalyptic number.

1285611560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285611560 is an abundant number, since it is smaller than the sum of its proper divisors (1610005600).

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

1285611560 is a wasteful number, since it uses less digits than its factorization.

1285611560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33245 (or 33241 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 1285611560 is about 35855.4258097711. The cubic root of 1285611560 is about 1087.3514124731.

The spelling of 1285611560 in words is "one billion, two hundred eighty-five million, six hundred eleven thousand, five hundred sixty".