12408531 has 8 divisors (see below), whose sum is σ = 16715664. Its totient is φ = 8186880.

The previous prime is 12408511. The next prime is 12408533. The reversal of 12408531 is 13580421.

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

It is not a de Polignac number, because 12408531 - 2⁵ = 12408499 is a prime.

It is a super-2 number, since 2×12408531² = 307943283155922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12408533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21030 + ... + 21611.

It is an arithmetic number, because the mean of its divisors is an integer number (2089458).

Almost surely, 2^12408531 is an apocalyptic number.

12408531 is a deficient number, since it is larger than the sum of its proper divisors (4307133).

12408531 is an equidigital number, since it uses as much as digits as its factorization.

12408531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42741.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 12408531 is about 3522.5744846632. The cubic root of 12408531 is about 231.5119732824.

Adding to 12408531 its reverse (13580421), we get a palindrome (25988952).

The spelling of 12408531 in words is "twelve million, four hundred eight thousand, five hundred thirty-one".