1921042 has 4 divisors (see below), whose sum is σ = 2881566. Its totient is φ = 960520.

The previous prime is 1921037. The next prime is 1921063. The reversal of 1921042 is 2401291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 982081 + 938961 = 991^2 + 969^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480259 + ... + 480262.

2^1921042 is an apocalyptic number.

1921042 is a deficient number, since it is larger than the sum of its proper divisors (960524).

1921042 is an equidigital number, since it uses as much as digits as its factorization.

1921042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960523.

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

The square root of 1921042 is about 1386.0165944173. The cubic root of 1921042 is about 124.3117804516.

Subtracting 1921042 from its reverse (2401291), we obtain a square (480249 = 693²).

The spelling of 1921042 in words is "one million, nine hundred twenty-one thousand, forty-two".