12158730 has 48 divisors (see below), whose sum is σ = 32221800. Its totient is φ = 3179904.

The previous prime is 12158717. The next prime is 12158737. The reversal of 12158730 is 3785121.

It can be written as a sum of positive squares in 4 ways, for example, as 12047841 + 110889 = 3471^2 + 333^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12158694 and 12158703.

It is not an unprimeable number, because it can be changed into a prime (12158737) 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 23 ways as a sum of consecutive naturals, for example, 3496 + ... + 6044.

Almost surely, 2^12158730 is an apocalyptic number.

12158730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12158730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16110900).

12158730 is an abundant number, since it is smaller than the sum of its proper divisors (20063070).

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

12158730 is a wasteful number, since it uses less digits than its factorization.

12158730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615 (or 2612 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12158730 is about 3486.9370513389. The cubic root of 12158730 is about 229.9478772877.

The spelling of 12158730 in words is "twelve million, one hundred fifty-eight thousand, seven hundred thirty".