1921056 has 24 divisors (see below), whose sum is σ = 5043024. Its totient is φ = 640320.

The previous prime is 1921037. The next prime is 1921063. The reversal of 1921056 is 6501291.

1921056 = 458² + 459² + ... + 466².

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

1921056 is a modest number, since divided by 1056 gives 192 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9910 + ... + 10101.

It is an arithmetic number, because the mean of its divisors is an integer number (210126).

2^1921056 is an apocalyptic number.

1921056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1921056 is an abundant number, since it is smaller than the sum of its proper divisors (3121968).

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

1921056 is a wasteful number, since it uses less digits than its factorization.

1921056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20024 (or 20016 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1921056 is about 1386.0216448526. The cubic root of 1921056 is about 124.3120824336.

The spelling of 1921056 in words is "one million, nine hundred twenty-one thousand, fifty-six".