1921204 has 24 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 855936.

The previous prime is 1921181. The next prime is 1921211. The reversal of 1921204 is 4021291.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 549 + ... + 2035.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

2^1921204 is an apocalyptic number.

It is an amenable number.

1921204 is a deficient number, since it is larger than the sum of its proper divisors (1828556).

1921204 is a wasteful number, since it uses less digits than its factorization.

1921204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1525 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1921204 is about 1386.0750340440. The cubic root of 1921204 is about 124.3152747258.

Adding to 1921204 its reverse (4021291), we get a palindrome (5942495).

The spelling of 1921204 in words is "one million, nine hundred twenty-one thousand, two hundred four".