12132531 has 8 divisors (see below), whose sum is σ = 17974160. Its totient is φ = 8088336.

The previous prime is 12132529. The next prime is 12132553. The reversal of 12132531 is 13523121.

12132531 is a `hidden beast` number, since 1 + 2 + 132 + 531 = 666.

It is not a de Polignac number, because 12132531 - 2¹ = 12132529 is a prime.

It is a super-2 number, since 2×12132531² = 294396616931922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12132581) 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 7 ways as a sum of consecutive naturals, for example, 224650 + ... + 224703.

It is an arithmetic number, because the mean of its divisors is an integer number (2246770).

Almost surely, 2^12132531 is an apocalyptic number.

12132531 is a deficient number, since it is larger than the sum of its proper divisors (5841629).

12132531 is an equidigital number, since it uses as much as digits as its factorization.

12132531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449362 (or 449356 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 12132531 is about 3483.1782900104. The cubic root of 12132531 is about 229.7825986046.

Adding to 12132531 its reverse (13523121), we get a palindrome (25655652).

The spelling of 12132531 in words is "twelve million, one hundred thirty-two thousand, five hundred thirty-one".