1285681204572 has 24 divisors (see below), whose sum is σ = 3012798022416. Its totient is φ = 426721085568.

The previous prime is 1285681204459. The next prime is 1285681204573. The reversal of 1285681204572 is 2754021865821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285681204573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229911583 + ... + 229917174.

It is an arithmetic number, because the mean of its divisors is an integer number (125533250934).

Almost surely, 2^{1285681204572} is an apocalyptic number.

1285681204572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285681204572 is an abundant number, since it is smaller than the sum of its proper divisors (1727116817844).

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

1285681204572 is a wasteful number, since it uses less digits than its factorization.

1285681204572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459828997 (or 459828995 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 1285681204572 in words is "one trillion, two hundred eighty-five billion, six hundred eighty-one million, two hundred four thousand, five hundred seventy-two".