1161859 has 4 divisors (see below), whose sum is σ = 1164016. Its totient is φ = 1159704.

The previous prime is 1161857. The next prime is 1161871. The reversal of 1161859 is 9581611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9581611 = 13 ⋅737047.

It is a cyclic number.

It is not a de Polignac number, because 1161859 - 2¹ = 1161857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1161859.

It is not an unprimeable number, because it can be changed into a prime (1161851) 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, 517 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (291004).

2^1161859 is an apocalyptic number.

1161859 is a deficient number, since it is larger than the sum of its proper divisors (2157).

1161859 is a wasteful number, since it uses less digits than its factorization.

1161859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156.

The product of its digits is 2160, while the sum is 31.

The square root of 1161859 is about 1077.8956350222. The cubic root of 1161859 is about 105.1278563425.

The spelling of 1161859 in words is "one million, one hundred sixty-one thousand, eight hundred fifty-nine".