1921384 has 8 divisors (see below), whose sum is σ = 3602610. Its totient is φ = 960688.

The previous prime is 1921363. The next prime is 1921393. The reversal of 1921384 is 4831291.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1898884 + 22500 = 1378^2 + 150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120079 + ... + 120094.

2^1921384 is an apocalyptic number.

It is an amenable number.

1921384 is a deficient number, since it is larger than the sum of its proper divisors (1681226).

1921384 is a wasteful number, since it uses less digits than its factorization.

1921384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240179 (or 240175 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 1921384 is about 1386.1399640729. The cubic root of 1921384 is about 124.3191570222.

The spelling of 1921384 in words is "one million, nine hundred twenty-one thousand, three hundred eighty-four".