1921141 has 4 divisors (see below), whose sum is σ = 1947532. Its totient is φ = 1894752.

The previous prime is 1921133. The next prime is 1921159. The reversal of 1921141 is 1411291.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1164241 + 756900 = 1079^2 + 870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1921141 - 2³ = 1921133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13086 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (486883).

2^1921141 is an apocalyptic number.

It is an amenable number.

1921141 is a deficient number, since it is larger than the sum of its proper divisors (26391).

1921141 is an equidigital number, since it uses as much as digits as its factorization.

1921141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26390.

The product of its digits is 72, while the sum is 19.

The square root of 1921141 is about 1386.0523078153. The cubic root of 1921141 is about 124.3139158647.

The spelling of 1921141 in words is "one million, nine hundred twenty-one thousand, one hundred forty-one".