1921286 has 4 divisors (see below), whose sum is σ = 2881932. Its totient is φ = 960642.

The previous prime is 1921277. The next prime is 1921307. The reversal of 1921286 is 6821291.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480320 + ... + 480323.

It is an arithmetic number, because the mean of its divisors is an integer number (720483).

2^1921286 is an apocalyptic number.

1921286 is a deficient number, since it is larger than the sum of its proper divisors (960646).

1921286 is an equidigital number, since it uses as much as digits as its factorization.

1921286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960645.

The product of its digits is 1728, while the sum is 29.

The square root of 1921286 is about 1386.1046136566. The cubic root of 1921286 is about 124.3170433576.

The spelling of 1921286 in words is "one million, nine hundred twenty-one thousand, two hundred eighty-six".