1921568 has 48 divisors (see below), whose sum is σ = 4245696. Its totient is φ = 848640.

The previous prime is 1921559. The next prime is 1921573. The reversal of 1921568 is 8651291.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18605 + ... + 18707.

It is an arithmetic number, because the mean of its divisors is an integer number (88452).

2^1921568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122848).

1921568 is an abundant number, since it is smaller than the sum of its proper divisors (2324128).

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

1921568 is a wasteful number, since it uses less digits than its factorization.

1921568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 169 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 1921568 is about 1386.2063338479. The cubic root of 1921568 is about 124.3231253414.

The spelling of 1921568 in words is "one million, nine hundred twenty-one thousand, five hundred sixty-eight".