1158220 has 24 divisors (see below), whose sum is σ = 2780064. Its totient is φ = 397056.

The previous prime is 1158217. The next prime is 1158247. The reversal of 1158220 is 228511.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3997 + ... + 4276.

It is an arithmetic number, because the mean of its divisors is an integer number (115836).

2^1158220 is an apocalyptic number.

1158220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158220 is an abundant number, since it is smaller than the sum of its proper divisors (1621844).

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

1158220 is a wasteful number, since it uses less digits than its factorization.

1158220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8289 (or 8287 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1158220 is about 1076.2062999258. The cubic root of 1158220 is about 105.0179863368.

It can be divided in two parts, 1158 and 220, that added together give a triangular number (1378 = T₅₂).

The spelling of 1158220 in words is "one million, one hundred fifty-eight thousand, two hundred twenty".