1921004 has 12 divisors (see below), whose sum is σ = 3375624. Its totient is φ = 956544.

The previous prime is 1920991. The next prime is 1921013. The reversal of 1921004 is 4001291.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (281302).

2^1921004 is an apocalyptic number.

It is an amenable number.

1921004 is a deficient number, since it is larger than the sum of its proper divisors (1454620).

1921004 is a wasteful number, since it uses less digits than its factorization.

1921004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1921004 is about 1386.0028859999. The cubic root of 1921004 is about 124.3109607786.

Adding to 1921004 its reverse (4001291), we get a palindrome (5922295).

The spelling of 1921004 in words is "one million, nine hundred twenty-one thousand, four".