1921086 has 12 divisors (see below), whose sum is σ = 4162392. Its totient is φ = 640356.

The previous prime is 1921079. The next prime is 1921097. The reversal of 1921086 is 6801291.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 53346 + ... + 53381.

It is an arithmetic number, because the mean of its divisors is an integer number (346866).

2^1921086 is an apocalyptic number.

1921086 is an abundant number, since it is smaller than the sum of its proper divisors (2241306).

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

1921086 is a wasteful number, since it uses less digits than its factorization.

1921086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106735 (or 106732 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1921086 is about 1386.0324671522. The cubic root of 1921086 is about 124.3127295331.

The spelling of 1921086 in words is "one million, nine hundred twenty-one thousand, eighty-six".