1283712560 has 80 divisors (see below), whose sum is σ = 3268853280. Its totient is φ = 465930240.

The previous prime is 1283712557. The next prime is 1283712613. The reversal of 1283712560 is 652173821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1283712560.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 50900 + ... + 71820.

It is an arithmetic number, because the mean of its divisors is an integer number (40860666).

Almost surely, 2^1283712560 is an apocalyptic number.

1283712560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1283712560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634426640).

1283712560 is an abundant number, since it is smaller than the sum of its proper divisors (1985140720).

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

1283712560 is a wasteful number, since it uses less digits than its factorization.

1283712560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21006 (or 21000 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1283712560 is about 35828.9346757617. The cubic root of 1283712560 is about 1086.8157665278.

The spelling of 1283712560 in words is "one billion, two hundred eighty-three million, seven hundred twelve thousand, five hundred sixty".