1921073 has 16 divisors (see below), whose sum is σ = 2440320. Its totient is φ = 1468800.

The previous prime is 1921069. The next prime is 1921079. The reversal of 1921073 is 3701291.

It is a cyclic number.

It is not a de Polignac number, because 1921073 - 2² = 1921069 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1921079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4493 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (152520).

2^1921073 is an apocalyptic number.

It is an amenable number.

1921073 is a deficient number, since it is larger than the sum of its proper divisors (519247).

1921073 is a wasteful number, since it uses less digits than its factorization.

1921073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1921073 is about 1386.0277774994. The cubic root of 1921073 is about 124.3124491242.

The spelling of 1921073 in words is "one million, nine hundred twenty-one thousand, seventy-three".