1113921 has 12 divisors (see below), whose sum is σ = 1636180. Its totient is φ = 730080.

The previous prime is 1113899. The next prime is 1113941. The reversal of 1113921 is 1293111.

It can be written as a sum of positive squares in 2 ways, for example, as 608400 + 505521 = 780^2 + 711^2 .

It is not a de Polignac number, because 1113921 - 2⁷ = 1113793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1113894 and 1113903.

It is not an unprimeable number, because it can be changed into a prime (1113941) 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 11 ways as a sum of consecutive naturals, for example, 466 + ... + 1563.

2^1113921 is an apocalyptic number.

It is an amenable number.

1113921 is a deficient number, since it is larger than the sum of its proper divisors (522259).

1113921 is a wasteful number, since it uses less digits than its factorization.

1113921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096 (or 2093 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

The square root of 1113921 is about 1055.4245591230. The cubic root of 1113921 is about 103.6616531501.

The spelling of 1113921 in words is "one million, one hundred thirteen thousand, nine hundred twenty-one".