1921144 has 32 divisors (see below), whose sum is σ = 3849120. Its totient is φ = 896896.

The previous prime is 1921133. The next prime is 1921159. The reversal of 1921144 is 4411291.

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, 9654 + ... + 9850.

It is an arithmetic number, because the mean of its divisors is an integer number (120285).

2^1921144 is an apocalyptic number.

It is an amenable number.

1921144 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1921144 is a wasteful number, since it uses less digits than its factorization.

1921144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 275 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 1921144 is about 1386.0533900251. The cubic root of 1921144 is about 124.3139805730.

The spelling of 1921144 in words is "one million, nine hundred twenty-one thousand, one hundred forty-four".