1921456 has 10 divisors (see below), whose sum is σ = 3722852. Its totient is φ = 960720.

The previous prime is 1921427. The next prime is 1921457. The reversal of 1921456 is 6541291.

It is not an unprimeable number, because it can be changed into a prime (1921457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60030 + ... + 60061.

2^1921456 is an apocalyptic number.

1921456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1921456 is a deficient number, since it is larger than the sum of its proper divisors (1801396).

1921456 is a wasteful number, since it uses less digits than its factorization.

1921456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120099 (or 120093 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 1921456 is about 1386.1659352329. The cubic root of 1921456 is about 124.3207098729.

The spelling of 1921456 in words is "one million, nine hundred twenty-one thousand, four hundred fifty-six".