1921006 has 8 divisors (see below), whose sum is σ = 3006864. Its totient is φ = 918720.

The previous prime is 1920991. The next prime is 1921013. The reversal of 1921006 is 6001291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20835 + ... + 20926.

It is an arithmetic number, because the mean of its divisors is an integer number (375858).

2^1921006 is an apocalyptic number.

1921006 is a deficient number, since it is larger than the sum of its proper divisors (1085858).

1921006 is a wasteful number, since it uses less digits than its factorization.

1921006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41786.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1921006 is about 1386.0036074989. The cubic root of 1921006 is about 124.3110039195.

Adding to 1921006 its reverse (6001291), we get a palindrome (7922297).

It can be divided in two parts, 19 and 21006, that added together give a square (21025 = 145²).

The spelling of 1921006 in words is "one million, nine hundred twenty-one thousand, six".