1285120887312 has 40 divisors (see below), whose sum is σ = 3324933485280. Its totient is φ = 427723582720.

The previous prime is 1285120887311. The next prime is 1285120887313. The reversal of 1285120887312 is 2137880215821.

It is an interprime number because it is at equal distance from previous prime (1285120887311) and next prime (1285120887313).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1285120887311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20281989 + ... + 20345252.

It is an arithmetic number, because the mean of its divisors is an integer number (83123337132).

Almost surely, 2^{1285120887312} is an apocalyptic number.

1285120887312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285120887312 is an abundant number, since it is smaller than the sum of its proper divisors (2039812597968).

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

1285120887312 is a wasteful number, since it uses less digits than its factorization.

1285120887312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40627911 (or 40627905 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 48.

The spelling of 1285120887312 in words is "one trillion, two hundred eighty-five billion, one hundred twenty million, eight hundred eighty-seven thousand, three hundred twelve".