1113861 has 32 divisors (see below), whose sum is σ = 1843200. Its totient is φ = 584640.

The previous prime is 1113859. The next prime is 1113863. The reversal of 1113861 is 1683111.

It is an interprime number because it is at equal distance from previous prime (1113859) and next prime (1113863).

It is not a de Polignac number, because 1113861 - 2¹ = 1113859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113863) 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 31 ways as a sum of consecutive naturals, for example, 18850 + ... + 18908.

It is an arithmetic number, because the mean of its divisors is an integer number (57600).

2^1113861 is an apocalyptic number.

It is an amenable number.

1113861 is a deficient number, since it is larger than the sum of its proper divisors (729339).

1113861 is a wasteful number, since it uses less digits than its factorization.

1113861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129.

The product of its digits is 144, while the sum is 21.

The square root of 1113861 is about 1055.3961341601. The cubic root of 1113861 is about 103.6597919137.

Adding to 1113861 its reverse (1683111), we get a palindrome (2796972).

The spelling of 1113861 in words is "one million, one hundred thirteen thousand, eight hundred sixty-one".