1123861 has 4 divisors (see below), whose sum is σ = 1128492. Its totient is φ = 1119232.

The previous prime is 1123841. The next prime is 1123867. The reversal of 1123861 is 1683211.

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 938961 + 184900 = 969^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123861 - 2⁹ = 1123349 is a prime.

It is a Duffinian number.

1123861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123867) 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, 1930 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (282123).

2^1123861 is an apocalyptic number.

It is an amenable number.

1123861 is a deficient number, since it is larger than the sum of its proper divisors (4631).

1123861 is an equidigital number, since it uses as much as digits as its factorization.

1123861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630.

The product of its digits is 288, while the sum is 22.

The square root of 1123861 is about 1060.1231060589. The cubic root of 1123861 is about 103.9690798120.

The spelling of 1123861 in words is "one million, one hundred twenty-three thousand, eight hundred sixty-one".