1289892 has 24 divisors (see below), whose sum is σ = 3187296. Its totient is φ = 404608.

The previous prime is 1289881. The next prime is 1289921. The reversal of 1289892 is 2989821.

It is a self number, because there is not a number n which added to its sum of digits gives 1289892.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2958 + ... + 3365.

It is an arithmetic number, because the mean of its divisors is an integer number (132804).

2^1289892 is an apocalyptic number.

1289892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1289892 is an abundant number, since it is smaller than the sum of its proper divisors (1897404).

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

1289892 is a wasteful number, since it uses less digits than its factorization.

1289892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347 (or 6345 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 1289892 is about 1135.7341238160. The cubic root of 1289892 is about 108.8556853426.

The spelling of 1289892 in words is "one million, two hundred eighty-nine thousand, eight hundred ninety-two".