1861113 has 8 divisors (see below), whose sum is σ = 2542176. Its totient is φ = 1210400.

The previous prime is 1861103. The next prime is 1861121. The reversal of 1861113 is 3111681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1861113 - 2⁵ = 1861081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1861113.

It is not an unprimeable number, because it can be changed into a prime (1861103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7443 + ... + 7688.

It is an arithmetic number, because the mean of its divisors is an integer number (317772).

2^1861113 is an apocalyptic number.

It is an amenable number.

1861113 is a deficient number, since it is larger than the sum of its proper divisors (681063).

1861113 is a wasteful number, since it uses less digits than its factorization.

1861113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15175.

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

The square root of 1861113 is about 1364.2261542721. The cubic root of 1861113 is about 123.0054198154.

Adding to 1861113 its reverse (3111681), we get a palindrome (4972794).

The spelling of 1861113 in words is "one million, eight hundred sixty-one thousand, one hundred thirteen".