1158978 has 8 divisors (see below), whose sum is σ = 2317968. Its totient is φ = 386324.

The previous prime is 1158977. The next prime is 1158991. The reversal of 1158978 is 8798511.

It is a sphenic number, since it is the product of 3 distinct primes.

1158978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1158977) 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, 96576 + ... + 96587.

It is an arithmetic number, because the mean of its divisors is an integer number (289746).

2^1158978 is an apocalyptic number.

1158978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1158978 is a wasteful number, since it uses less digits than its factorization.

1158978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193168.

The product of its digits is 20160, while the sum is 39.

The square root of 1158978 is about 1076.5584052897. The cubic root of 1158978 is about 105.0408911028.

The spelling of 1158978 in words is "one million, one hundred fifty-eight thousand, nine hundred seventy-eight".