1921472 has 28 divisors (see below), whose sum is σ = 4358640. Its totient is φ = 823296.

The previous prime is 1921457. The next prime is 1921477. The reversal of 1921472 is 2741291.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697 + ... + 2592.

2^1921472 is an apocalyptic number.

It is an amenable number.

1921472 is an abundant number, since it is smaller than the sum of its proper divisors (2437168).

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

1921472 is an equidigital number, since it uses as much as digits as its factorization.

1921472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308 (or 4298 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 1921472 is about 1386.1717065357. The cubic root of 1921472 is about 124.3210549456.

The spelling of 1921472 in words is "one million, nine hundred twenty-one thousand, four hundred seventy-two".