1921926 has 32 divisors (see below), whose sum is σ = 4227840. Its totient is φ = 579744.

The previous prime is 1921921. The next prime is 1921937. The reversal of 1921926 is 6291291.

1921926 = 309² + 310² + ... + 327².

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1921893 and 1921902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921921) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2256 + ... + 2988.

It is an arithmetic number, because the mean of its divisors is an integer number (132120).

2^1921926 is an apocalyptic number.

1921926 is an abundant number, since it is smaller than the sum of its proper divisors (2305914).

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

1921926 is a wasteful number, since it uses less digits than its factorization.

1921926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its digits is 1944, while the sum is 30.

The square root of 1921926 is about 1386.3354572397. The cubic root of 1921926 is about 124.3308455843.

It can be divided in two parts, 19 and 21926, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 1921926 in words is "one million, nine hundred twenty-one thousand, nine hundred twenty-six".