1921135 has 4 divisors (see below), whose sum is σ = 2305368. Its totient is φ = 1536904.

The previous prime is 1921133. The next prime is 1921159. The reversal of 1921135 is 5311291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5311291 = 67 ⋅79273.

It is a cyclic number.

It is not a de Polignac number, because 1921135 - 2¹ = 1921133 is a prime.

It is a Duffinian number.

1921135 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192109 + ... + 192118.

It is an arithmetic number, because the mean of its divisors is an integer number (576342).

2^1921135 is an apocalyptic number.

1921135 is a deficient number, since it is larger than the sum of its proper divisors (384233).

1921135 is an equidigital number, since it uses as much as digits as its factorization.

1921135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384232.

The product of its digits is 270, while the sum is 22.

The square root of 1921135 is about 1386.0501433931. The cubic root of 1921135 is about 124.3137864478.

The spelling of 1921135 in words is "one million, nine hundred twenty-one thousand, one hundred thirty-five".