1167858 has 36 divisors (see below), whose sum is σ = 2657070. Its totient is φ = 384912.

The previous prime is 1167853. The next prime is 1167869. The reversal of 1167858 is 8587611.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 59049 = 1053^2 + 243^2 .

It is not an unprimeable number, because it can be changed into a prime (1167853) 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 17 ways as a sum of consecutive naturals, for example, 13078 + ... + 13166.

2^1167858 is an apocalyptic number.

1167858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1167858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328535).

1167858 is an abundant number, since it is smaller than the sum of its proper divisors (1489212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1167858 is an frugal number, since it uses more digits than its factorization.

1167858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 94 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 1167858 is about 1080.6747891942. The cubic root of 1167858 is about 105.3084805793.

It can be divided in two parts, 1167 and 858, that added together give a square (2025 = 45²).

The spelling of 1167858 in words is "one million, one hundred sixty-seven thousand, eight hundred fifty-eight".