1286919852 has 24 divisors (see below), whose sum is σ = 3004012032. Its totient is φ = 428802000.

The previous prime is 1286919827. The next prime is 1286919857. The reversal of 1286919852 is 2589196821.

1286919852 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1286919795 and 1286919804.

It is not an unprimeable number, because it can be changed into a prime (1286919857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11977 + ... + 52127.

It is an arithmetic number, because the mean of its divisors is an integer number (125167168).

Almost surely, 2^1286919852 is an apocalyptic number.

1286919852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1286919852 is an abundant number, since it is smaller than the sum of its proper divisors (1717092180).

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

1286919852 is a wasteful number, since it uses less digits than its factorization.

1286919852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42829 (or 42827 counting only the distinct ones).

The product of its digits is 622080, while the sum is 51.

The square root of 1286919852 is about 35873.6651598356. The cubic root of 1286919852 is about 1087.7201321586.

The spelling of 1286919852 in words is "one billion, two hundred eighty-six million, nine hundred nineteen thousand, eight hundred fifty-two".