1285278958746 has 112 divisors (see below), whose sum is σ = 2914520525280. Its totient is φ = 424881145440.

The previous prime is 1285278958679. The next prime is 1285278958787. The reversal of 1285278958746 is 6478598725821.

1285278958746 is a `hidden beast` number, since 1 + 2 + 8 + 527 + 8 + 9 + 58 + 7 + 46 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 221101336 + ... + 221107148.

It is an arithmetic number, because the mean of its divisors is an integer number (26022504690).

Almost surely, 2^{1285278958746} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285278958746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457260262640).

1285278958746 is an abundant number, since it is smaller than the sum of its proper divisors (1629241566534).

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

1285278958746 is a wasteful number, since it uses less digits than its factorization.

1285278958746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7063 (or 7048 counting only the distinct ones).

The product of its digits is 541900800, while the sum is 72.

The spelling of 1285278958746 in words is "one trillion, two hundred eighty-five billion, two hundred seventy-eight million, nine hundred fifty-eight thousand, seven hundred forty-six".