12158532 has 48 divisors (see below), whose sum is σ = 31857280. Its totient is φ = 4009824.

The previous prime is 12158527. The next prime is 12158539. The reversal of 12158532 is 23585121.

It is a happy number.

12158532 is a `hidden beast` number, since 121 + 5 + 8 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 12158496 and 12158505.

It is not an unprimeable number, because it can be changed into a prime (12158539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10578 + ... + 11670.

Almost surely, 2^12158532 is an apocalyptic number.

12158532 is a gapful number since it is divisible by the number (12) 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 12158532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15928640).

12158532 is an abundant number, since it is smaller than the sum of its proper divisors (19698748).

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

12158532 is a wasteful number, since it uses less digits than its factorization.

12158532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1201 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 12158532 is about 3486.9086595436. The cubic root of 12158532 is about 229.9466290782.

It can be divided in two parts, 121 and 58532, that added together give a triangular number (58653 = T₃₄₂).

The spelling of 12158532 in words is "twelve million, one hundred fifty-eight thousand, five hundred thirty-two".