1158885 has 48 divisors (see below), whose sum is σ = 2481024. Its totient is φ = 487296.

The previous prime is 1158881. The next prime is 1158887. The reversal of 1158885 is 5888511.

It is not a de Polignac number, because 1158885 - 2² = 1158881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3954 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (51688).

2^1158885 is an apocalyptic number.

1158885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1158885 is an abundant number, since it is smaller than the sum of its proper divisors (1322139).

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

1158885 is a wasteful number, since it uses less digits than its factorization.

1158885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 311 counting only the distinct ones).

The product of its digits is 12800, while the sum is 36.

The square root of 1158885 is about 1076.5152112256. The cubic root of 1158885 is about 105.0380814250.

The spelling of 1158885 in words is "one million, one hundred fifty-eight thousand, eight hundred eighty-five".