1158656 has 40 divisors (see below), whose sum is σ = 2422464. Its totient is φ = 552960.

The previous prime is 1158653. The next prime is 1158673. The reversal of 1158656 is 6568511.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15836 + ... + 15908.

2^1158656 is an apocalyptic number.

1158656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211232).

1158656 is an abundant number, since it is smaller than the sum of its proper divisors (1263808).

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

1158656 is an frugal number, since it uses more digits than its factorization.

1158656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 106 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 1158656 is about 1076.4088442595. The cubic root of 1158656 is about 105.0311623303.

The spelling of 1158656 in words is "one million, one hundred fifty-eight thousand, six hundred fifty-six".