1921922 has 4 divisors (see below), whose sum is σ = 2882886. Its totient is φ = 960960.

The previous prime is 1921921. The next prime is 1921937. The reversal of 1921922 is 2291291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2291291 = 163 ⋅14057.

It can be written as a sum of positive squares in only one way, i.e., 1825201 + 96721 = 1351^2 + 311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1921891 and 1921900.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480479 + ... + 480482.

2^1921922 is an apocalyptic number.

1921922 is a deficient number, since it is larger than the sum of its proper divisors (960964).

1921922 is an equidigital number, since it uses as much as digits as its factorization.

1921922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960963.

The product of its digits is 648, while the sum is 26.

The square root of 1921922 is about 1386.3340145867. The cubic root of 1921922 is about 124.3307593299.

The spelling of 1921922 in words is "one million, nine hundred twenty-one thousand, nine hundred twenty-two".